A fair coin with sides marked heads and tails is to be tossed seven times. What is the probability that the coin will land tails side up more than four times?  Choose one:
A) 29/128  B) 56/256  C) 65/256  D) 70/256  E) 81/256
More than 5 times tails = 6times +7times+5times = 7C6 + 7C7 + 7C5= 29   2 2 2 2 2 2 2   2^8 times total events and 29 events where tails side up .   So probability = 29/2^7 = 29/128 (29/128nswer 29/128)
<result>A</result>
A fair coin with sides marked heads and tails is to be tossed seven times. What is the probability that the coin will land tails side up more than four times?