Subject: mathqa
Question: if the probability of rain on any given day in chicago during the summer is 50 % , independent of what happens on any other day , what is the probability of having exactly 3 rainy days from july 4 through july 9 inclusive ?
Option: 
A: 17 / 64
B: 7 / 32
C: 3 / 16
D: 5 / 16
Answer: D