Number Cube Probability

Number Cube Probability

Probability is the chance of the outcome of an event of a particular experiment. Probabilities are occurs always numbers between 0(impossible) and 1(possible). The set of all possible outcomes of a particular experiment is called as sample space. For example probability of getting a 3 when rolling a dice is 1/6. In this article we will discuss about probability problems using number cube.

Number Cube Probability - Example Problems

Example 1: If rolling a number cube, what is the probability of getting prime number?

Solution:

Let S be the sample space, n(S) = 6.

A be the event of getting prime number.

A = {2,3, 5}, n(A) = 3

P(A) = `(n(A))/(n(S))` = `3/6` = `1/2`

Example 2: If rolling two number cubes, what is the probability of getting a sum of odd?

Solution:

Let S be the sample space, n(S) = 6 * 6 = 36.

A be the event of getting a sum of odd.

n(A) = {{1, 2), (1, 4), (1, 6)....(6, 1), (6, 3), (6, 5)} = 18

P(A) = `(n(A))/(n(S))` = `18/36` = `1/2`

Therefore probability of getting a sum of odd is `1/2`

Example 3: If rolling two number cubes, what is the probability of getting a sum of 10 or 7?
Solution:

Let S be the sample space, n(S) = 6 * 6 = 36.

A be the event of getting 10.

n(A) = {{4, 6), (5, 5), (6, 4)} = 3

P(A) = `(n(A))/(n(S))` = `3/36` = `1/12`

Let B be the event of getting sum of 7.

n(B) = {(1, 6), (2, 5), (3, 4), (4, 3), (5, 2), (6, 1)} = 6

P(B) = `(n(B))/(n(S))` = `6/36` = `1/6`

P(A or B) = P(A) + P(B) = `1/12` + `1/6` = `1/4`

P(A or B) = `1/4`

Therefore probability of getting a sum of 10 or 7 is `1/4`


Number Cube Probability - Practice Problems

Problem 1: If rolling a number cube, what is the probability of getting composite number?

Problem 2: If rolling two number cubes, what is the probability of getting 9 or 6?

Answer: 1) `2/3` 2) `5/18`

Linear Approximation Table

Introduction to linear approximation table:

In mathematics, the procedure for determining the straight line is that closely fit curvature at various sites. Linear approximation equation is given as y = ax + b, the values of a and b are chosen that the line meet the curve at the preferred site, or value of x, and the evaluation of the line equals the rate of change of the curve at that site.

The majority curvature, linear approximation are first-rate only particularly close to the preferred x. The table consist both rows and columns. We can put the values in the table. It should be very easy for the student to study.

Formula-linear Approximation Table:

Linear approximation of the domain function represented as  f(x). Digression line to the table of f(x) at the point (`x_0, y_0` ) where `y_0` is given as `y_0` = f(`x_0` ). It is represented as

` y-y_0= f(x_0)(x-x_0)`

If x is closed the `x_0` , the formula can be written as `x_1 = x_0Deltax `

In mathematics, a linear approximation is an approximation of a universal function. The linear approximation uses a linear function. The linear function is more accurate and affine functions .They are widely used in the method of finite differences to create first order methods for solving or determining solutions to equations. It is given by,

f(x )= f(a) + f'(a)(x-a) + R2
f(x) = f(a) + f'(a)(x-a)

Linear approximation function:

A linear approximation functions to a function at a point can be computed by striking the primary expression in the Taylor series,

`F(x_0+Delta)`  = `f(x_0)+f(x_0)Delta+....`

The Newton’s method linear approximation can be estimated using linear approximation.

Example Problems- Linear Approximation Table:

Example 1- Using linear approximation table

Consider the linear function y = f(x) = `5x^2`

Solution:

Let` Deltax ` is an increment of x.

Therefore, `Deltay ` is also an increment of y.

Hence, we have

= f(x + `Deltax` )-f(x)

= 5(x + `Deltax` )`^2` – `5x^2`

= 25x( `Deltax` ) + 4 `(Deltax)^2`

The differential equation can be determined by using the given linear function.

Therefore `(dy)/(dx)` =25x

Hence, dy = 10x dx

Example 2- Using linear approximation table

Consider the linear function y = f(x) = `3x^2`

Solution:

Let` Deltax ` is an increment of x.

Therefore, `Deltay` is also an increment of y.

Hence, we have

= f(x + `Deltax` )-f(x)

= 3(x + `Deltax` )`^2` – `3x^2`

= 9x( `Deltax` ) + 2` (Deltax)^2`

The differential equation can be determined by using the given linear function.

Therefore `(dy)/(dx)` =9x

Hence, dy = 6x dx.

These all are the above explanation and examples make clear about this linear approximation.

Solve Math Fractions Problems

Solve math fractions problems:

In this article we are discussing  the solve math fractions problems. A fraction is a number that can represent part of a whole. The earliest fractions were reciprocals of integers: ancient symbols representing one part of two, one part of three, one part of four, and so on. A much later development were the common or "vulgar" fractions which are still used today (`1/2` , `5/8` , `3/4` etc.) and which consist of a numerator and a denominator. (Source – Wikipedia)

Solve math fractions problems is simple addition fraction, multiplication fraction, subtraction fraction and dividing fractions.

Solve Math Fractions Problems-example Problems:

Example 1:

Add the fractions for given two fraction, `3/9` + ` 3/9`

Solution:

The given two fractions are `3/9` + `3/9`

The same denominators of the two fractions, so

= `3/9 ` + `3/9`

Add the numerators the 3 and 3 = 3+3 = 6.

The same denominator is 9.

=` 6/9`

The addition fraction solution is `2/3.`

Example 2:

Subtract the fractions for given two fractions `4/6` - `6/5`

Solution:

The denominator is different so we take a (lcd) least common denominator

LCD = 6 x 5 = 30

So multiply and divide by 5 in first term we get

` (4 xx 5) / (6 xx 5)`

=`20/30`

Multiply and divide by 6 in second terms

= `(6 xx 6) / (5 xx 6)`

= `36/30`

The denominators are equals

So subtracting the numerator directly = `(20-36)/30`

Simplify the above equation we get = `-16/30`

Therefore the final answer is `-8/15`

Example 3:

Multiply the fractions for given two fractions, `4/5` x `5/4`

Solution:

The given two fractions are `4/5` x `5/4`

The multiply numerator and denominators of the two fractions, so

= `4/5` x `5/4`

Multiply the numerators the 4 and 5 = 4 x 5 = 20.

Multiply the denominators the 5 and 4 = 5 x 4= 20

= `20/20`

The multiply fraction solution is 1

Example 4:

Dividing fraction:

`4/3` divides `2/4`

Solution:

First we have to take the reciprocal of the second number

Reciprocal of `2/4 ` = `4/2`

Now we multiply with first term we get

`4/3` x `4/2`

Multiply the numerator and denominator

`(4 xx 4) / (3 xx 2)`

Simplify the above equation we get

= `16/6`

Therefore the final answer is `8/3`


Solve Math Fractions Problems-practice Problems:

Problem 1: Add the two fraction `2/8` +`2/8`

Solution: `1/2`

Problem 2: Subtract two fractions `10/10` – ` 6/10`

Solution: `2/5`

Problem 3: multiply two fractions `3/5` x  `5/5`

Solution: `3/5`

Problem 4: Dividing two fractions `6/3` and `2/4`

Solution: 4

Matrices Algebra 1

Introduction to matrices algebra 1.

An  rectangular arrangement of numbers in rows and columns within the paranthesis is called a matrix. If there are m rows and n columns in a matrix then m `xx` n is called order of the matrix. In this topic let us know three operations on the given matrices.

Two matrices A and B can be added or subtracted if their orders are same. If not matrix addition or subtraction is not defined.

Two matrices can be multiplied if the number of column in the first matrix is equal to the number of rows in the second matrix. Otherwise the matrix multiplication is not defined.

Now let us see few problems in this topic matrices algebra 1

Examples of Matrices Algebra 1

Ex 1: Find the sum of the given matrices A and B.

A = `[[1,2],[3,4]]`    and B = `[[5,7],[6,8]]`

Soln: Since A and B are having same orders 2 `xx` 2,

A + B =  `[[1,2],[3,4]]` + `[[5,7],[6,8]]`

= `[[1+5,2+7],[3+6,4+8]]`   [Add the corresponding values]

Therefore A + B =  `[[6,9],[9,12]]`

Ex 2: Find the value of the given equation 2A – B.

Here A = `[[4,6],[7,5]]` and B = `[[3,2],[1,4]]`

Soln: 2A – B  = 2 `[[4,6],[7,5]]` - `[[3,2],[1,4]]`

= `[[2xx4, 2xx6],[2xx7,2xx5]]` - `[[3,2],[1,4]]`

= `[[8,12],[14,10]]` `[[3,2],[1,4]]`

= `[[8**3, 12**2],[14**1,10**4]]` [Subtract the corresponding values]

= `[[5,10],[13,6]]`

Therefore 2A – B =` [[5,10],[13,6]]`


More Example Problems on Matrices Algebra 1

Ex 3: Multiply the following matrices if possible:

(i)  A = `[[2,3,4],[5,6,7]]` and B  = `[[2,7],[5,6]]`

(ii) A = `[[3,4],[2,8]] `  and  B = `[[7,2],[1,8]]`

Soln: (i) The order of matrix

A = `[[2,3,4],[5,6,7]]` is 2 `xx` 3and B  = `[[2,7],[5,6]]`

For B, it is 2 `xx` 2.

Here the number of column in A is not equal to the number of rows in B (3≠ 2). Therefore AB is not possible.

(ii) Here in A and B, the number columns in A is equal number of rows in B (2=2). Therefore AB is possible

Therefore AB =  `[[3,4],[2,8]] ` `[[7,2],[1,8]]`

= `[[3 xx 7 + 4 xx 1,3 xx 2 + 4 xx 8],[2 xx 7 + 8 xx 1,2 xx 2 + 8 xx 8]]`

= `[[21 + 4,6 + 32],[14 + 8,4 + 64]]`

= `[[25,38],[22,68]]`

All Kinds of Math

Introduction to math:

Math is considered as the study of all quantity and all structure. Maths is considered as the tool in all fields. The math is mostly applicable in for the engineering and also for numerical analysis. The major kinds of the mathematics are algebra, trigonometry, statistics, probability and geometry. Here we are going to discuss about some kinds of math.

Kinds of Math

Kinds of math:

Algebra:

Algebra is considered as a kind of math which defines about the study of  all rules and also the operations. Algebra is also concerned with the equations, polynomials and all structure of algebra. This is considered as the main branch of mathematics. The algebra is classified into the various categories.

Statistics:

Statistics is a kind of math which makes use of a numerical data which is related to the group of individuals and experiments. Statistics deals with the collection, analysis and also the plan for the collection and analysis of data. Statistics includes the basic terms such as mean, median, Range, and mode.

Mean – process of finding the average of the numbers in the list.
Range – difference between the largest value and the smallest value in the list.
Median –finding the middle term from the list.
Mode – process of finding the frequently occurred term.
Trigonometry:

Trigonometry is the study of triangles which in particular defines the right triangles. This trigonometry takes place in both applied maths and also pure math which deals with the relations between the angle of the triangle and sides of the triangle. This includes three main functions such as sin, cos, tan.

Probability:

It is also a kind of math which defines the way for expressing the knowledge of events to occur. This probability is used in the areas such as statistics and finance.

Geometry:

Geometry is also a kind of math which defines the questions about the different kinds of shapes and also the study about the shapes. It is also related with the real life. Normal shapes used in geometry are triangle, circle, polygons, square and quadrilateral.

Example Problems

Example problem in algebra:

Solve: 2 (x+3) – (x+5) = 3(x+2) – (2x +5)

Solution:

2 (x+3) – (x+5) = 3(x+2) – (2x +5)

2x + (2*3) – (x+5) = 3x + (3 * 2) – 4x +7

2x + 6 – x + 5 = 3x + 6 -4x - 7

2x – x + 1 = 3x – 4x - 1

x + 1 = - x - 1

0 = 0

Hence the given equation is solved.

Example problems in statistics:

Find the mean, median, mode and range for the numbers 8, 6, 7, 4, 8, 5, 6, 8, 2.

Solution:

Mean:

Mean = `54/9` = 6.

Median:

Arrange the numbers in numerical order 2, 4, 5, 6, 6, 7, 8, 8, 8.

The term which is in middle is considered as the median. Therefore the answer is 6.

Range:

Range = maximum value – minmum value

Maximum value = 8.

Lowest value = 2.

Range = 8 – 2.

= 6.

Example in probability:

Three coins are tossed randomly. Find the sample space of getting 2 tails at the same time.

Solution:

Sample space = { HHH, HHT, HTT, HTH, THH, TTH, THT, TTT}

Probability of getting 2 tails = {TTH, THT, HTT, TTT}

= (Number of possible outcomes / Total number of outcomes}

= `4/8`

= `1/2`

Partial Products Math

Introduction of partial products math:

The partial products math is nothing but the numerical values and their operations in math. Partial products math topic involves the product of the natural numbers and the integers. Thus the partial products math not only deals with the products but also with the arithmetic operations like addition, subtraction and division. The whole numbers includes the natural numbers. Let capital N denotes the natural numbers.

Partial Products Math:

The partial products math is nothing but the summing of the two terms not only through the addition but also through the product method. First the terms are rounded and made to multiply with the left most term of the number. Then the second term is made to rounded and the values are made to multiplied with the another term of the left. Then the left most term can be made multiplied with left most term of another term. Then the right most term can be made to multiplied with the right most term of the another term.

At last the values are made to summing up and the total of the values gives the product of the both terms. This is how the product partial terms are executed. The partial math includes all the operations like addition and subtraction in the same manner. Then the second term is made to rounded and the values are made to multiplied with the another term of the left. Then the left most term can be made multiplied with left most term of another term.

Examples for the Partial Products Math:

Example1: Find the partial product of the term 83 x 27?



83
27
----
80*20 -> 1600
80* 7 ->  560
3*20 ->   60
3* 7 ->   21
----
2241
Answer: 2241

Example2: Find the partial product of the term 93 x 25?



93

25

--------

90*20 -> 1800

90*  5 ->   450

3*20 ->     60

3*  5 ->     15

---------

2325

Answer: 2325