Suppose you flip a fair coin five times. What is the probability that, in five flips, you get at least one head?  Pick one:
A) 27/32
B) 25/32
C) 17/32
D) 15/32
E) 31/32
Best way of solving an at least 1 type of question is to compute 1 - probability of flipping 0 heads   probability of flipping either a head or a tail = 1/2   probability of flipping 3 tails in a row (1/2)^5   probability of flipping at least 1 head = 1 - (1/2)^5 = 31/32   Answer : 31/32
<result>E</result>
Suppose you flip a fair coin five times. What is the probability that, in five flips, you get at least one head?