Question

A fair quarter, a fair dime, a fair nickel, and a fair penny are tossed. Find the probability of obtaining exactly one head.

Answer 1

We know that the probability of getting a head in a single coin is:

`p=0.5`

Now, we can calculate the probability of X out of N coins landing heads up with the binomal distribution:

With p = 0.5 and N = 4, we get:

Subtituting X = 1 ("getting one head"), we get that:

`P=0.0625`