# Math

posted by
**Tiffany**
.

An unfair coin with Pr[H]=0.25 is flipped 95 times. A random variable X is defined as the number of heads that occur. Find the standard deviation.

Any help??

posted by
**Tiffany**
.

An unfair coin with Pr[H]=0.25 is flipped 95 times. A random variable X is defined as the number of heads that occur. Find the standard deviation.

Any help??