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 8, inclusive?	Choose the correct choice:  A) 1/32  B) 2/25  C) 5/16  D) 8/25  E) 3/4
From July 4 to July 8, we have total of 5 days. Prob of raining on exactly 3 days = 55/163∗(1/2)3∗(1/2)255/163∗(1/2)3∗(1/2)2   = 5/16   ANS: 5/16
<result>C</result>
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 8, inclusive?