A coin is tossed 4 times. What is the probability of getting exactly 3 heads?	Select.
A) 1 / 2	B) 1 / 4	C) 1 / 8	D) 1 / 16	E) 3 / 16

Rationale: the number of possible outcomes is 2 ^ 4 = 16 there are 4 ways to get exactly 3 heads . p ( exactly 3 heads ) = 4 / 16 = 1 / 4 the answer is b .
Answer: B