What is the probability of flipping a fair coin four times and the coin landing on heads on at least two flips?  Choose the correct choice from the following answers: A) 1/16 B) 15/16 C) 9/16 D) 11/16 E) 7/16
There are totally 16 outcomes   Chances of all being heads is 1/16   Chances of 3 heads is = 4c34c3 ways = 4/16   Chances of 2 heads is 4c24c2 ways = 6/16   hence 1/16+4/16+6/16=11/161/16+4/16+6/16=11/16   Ans: "11/16"
<result>D</result>
What is the probability of flipping a fair coin four times and the coin landing on heads on at least two flips?