Probability Formula Wiki

Introduction to Probability Formula Wiki

The probability is the sketch of match up information or scheme that an occurrence will happen. The probability of an event A should be represented as P(A). The probability value is always the range from 0 and 1. The wiki answers are used for checking our resultant of problems. In this article, we are going to learn about formula and examples in probability wiki.

Formula for Probability Wiki

The formula for probability of an event A is measured as the following formula,

This is the formula that is used for calculating probability of any event.

Example Problems - Probability Formula Wiki

Example 1:

Jockey tossing three coins at concurrently. Calculate the probability of receiving one head or more than one tail?

Solution:

The sample space, when three fair coins tossed is,

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

n(S) = 8

Let us consider A will be the event of getting one head,

n(A) = {HTT, THT, TTH} = 3

Let us consider B will be the event of getting more than one tail,

n(B) = {HTT, THT, TTH, TTT} = 4

P(A) = `(n(A))/(n(S))` = `3 / 8`

P(B) = `(n(B))/(n(S))` = `4 / 8`

P(A or B) = P(A) + P(B)

= `3/8` + `4/8`

= `7/8`

= 0.875

Example 2:

Calculate the probability of selecting a letter ‘S’ from the word ‘RESPONSIBILITY’?

Solution:

Given word is, “RESPONSIBILITY”.

Here, total letters, n(S) = 14

Let consider G be the event of selecting a letter ‘S’ from the given word.

Total number of letter ‘S’, n(G) = 2

So, probability of selecting letter ‘S’, P(G) = `(n(G))/(n(S))`

= `2/14`

= `1/7`
Between, if you have problem on these topics how many prime numbers from 1 to 100, please browse expert math related websites for more help on solving systems of linear differential equations by elimination.
Example 3:

There are totally 34 handbags are in a shop. In those handbags, 8 are Black color, 12 are Maroon color, 5 are Grey color and remaining are Purple color. Calculate the probability for selecting i) Black color handbags ii) Grey color handbags?

Solution:

Total number of handbags, n(S) = 34

Number of Black color handbags = 8

Number of Maroon color handbags = 12

Number of Grey color handbags = 5

Number of Purple color handbags = 34 – (8+12+5)

= 34 – 25

= 9

Let us consider G be the event of selecting Black color handbags.

So, n(G) = 8

P(G) = `(n(G))/(n(S))`

= `8/34`

= `4/17`

Let us consider H be the event of selecting Grey color handbags.

So, n(H) = 5

P(H) = `(n(H))/(n(S))`

= `5/34`

That’s all about probability formula wiki.