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# Probability Formulas

Probability deals with the measure or estimation of events that are likely to happen. In mathematics, probability is the calculation of uncertainty.

We have few basic formals that are used to calculate the probability and they are stated as:

 Related Calculators Calculation of Probability Binomial Distribution Probability Calculator Binomial Probability Calculator Coin Toss Probability Calculator

## Probability Problems

Below are the problems on based on probability :

### Solved Examples

Question 1: Calculate the probability of getting an odd number if a die is rolled?

Solution:

Sample space(S) if a die is rolled = {1, 2, 3, 4, 5, 6}
Let "E" be the event of getting an odd number, E = {1, 3, 5}
So, the Probability of getting an odd number P(E) = $\frac{Number\ of\ outcomes\ favorable}{Total\ number\ of\ outcomes}$ = $\frac{n(E)}{n(S)}$ = $\frac{3}{6}$ = $\frac{1}{2}$

Question 2: If two coins are tossed, then calculate the probability of getting two tails?

Solution:

Sample space(S), when two coins are tossed = {(H, H), (H, T), (T, H), (T, T) } = 4
Let "E" is the event of getting an odd number, E = {(T, T)} = 1
So, the Probability of getting an odd number P(E) = $\frac{Number\ of\ outcomes\ favorable}{Total\ number\ of\ outcomes}$ = $\frac{n(E)}{n(S)}$ = $\frac{1}{4}$

 More topics in Probability Formulas Conditional Probability Formula Probability Distribution Formula Binomial Probability Formula Skewness Formula Exponential Distribution Formula Hypergeometric Distribution Formula Geometric Distribution Formula Coin Toss Probability Formula Bayes Theorem Formula Empirical Probability Formula
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