What is the probability of flipping a fair coin nine times and the coin landing on heads on at least two flips?  Choose one:
A) 57/64  B) 119/128  C) 251/256  D) 503/512  E) 509/512
The number of possible outcomes is 2^9=512.   0 heads: There is 1 way to have all tails.   1 head: There are 9 ways to have one head.   P(0 or 1 head)=10/512=5/256   P(at least 2 heads)=1 - 5/256 = 251/256   The answer is 251/256.
<result>C</result>
What is the probability of flipping a fair coin nine times and the coin landing on heads on at least two flips?