Need help please A statistician determines the amount of dai

Need help please.

A statistician determines the amount of daily pocket money to give to his son by flipping 5 quarters, and giving the quarters which turn up heads.

a) What is the mean amount of daily pocket money his son receives? Enter the result in cents to 2 places after the decimal, without the units, i.e. xx.xx

Solution

probability of heads in 5 flips = 1/2 *1/2 * 1/2 *1/2 *1/2

hence total money = 1/32 * 1quarter=1/32* 25 cents=0.78125

Answer= 0.78