Answer:
5/16
Explanation:
There are a total of 16 different outcomes because 2*2*2*2 = 16.
There are 5 different ways for him to get 3 or more heads:
HHHT
HHTH
HTHH
THHH
HHHH
Therefore the probability is 5/16
5.6m questions
7.4m answers