If a coin is flipped, the probability that the coin will land tails is 1/2. If the coin is flipped 4 times, what is the probability that it will land tails up on the first 2 flips and not on the last 2 flips?  Select the correct option
A) 1 / 4
B) 1 / 8
C) 1 / 2
D) 1 / 16
E) 1 / 32

Rationale: ( 1 / 2 ) * ( 1 / 2 ) * ( 1 / 2 ) * ( 1 / 2 ) = 1 / 16 answer : d
Answer: D