**Summary
If X ~ B(n, p), then P(X = r) = ^{n}C_{r} p^{r} q^{n-r}
Examples of Binomial Distributions:**

No. of heads obtained from 5 throws of a coin

No. of sixes obtained from 5 throws of a die

No. of rotten apples out of 20

No. of defective articles out of 20

No. of people out of 20 with birthdays in January

No. of people out of 100 who wears glasses