If a certain coin is flipped, the probability that the coin will land heads is 1/2. If the coin is flipped 6 times, what is the probability that it will land heads up on the first 4 flips but not on the last 2 flips?  Choose the correct choice from the following answers:
A) 1/8	B) 1/16	C) 1/32	D) 1/64	E) 1/128
P(HHHHTT) = 1/2*1/2*1/2*1/2*1/2*1/2 = 1/64   The answer is 1/64.
<result>D</result>
If a certain coin is flipped, the probability that the coin will land heads is 1/2. If the coin is flipped 6 times, what is the probability that it will land heads up on the first 4 flips but not on the last 2 flips?