What is the probability of flipping a fair coin seven times and the coin landing on heads on at least two flips?	Choices: A) 7/8 B) 15/16 C) 31/32 D) 63/64 E) 127/128
The number of possible outcomes is 2^7=128.   0 heads: There is 1 way to have all tails.   1 head: There are 7 ways to have one head.   P(0 or 1 head)=8/128=1/16   P(at least 2 heads)=1 - 1/16 = 15/16   The answer is 15/16.
<result>B</result>
What is the probability of flipping a fair coin seven times and the coin landing on heads on at least two flips?