Question

3 unbaised coins are tossed . what is the probability of getting
(a) 2 heads
(b) at least 2 heads
(c) at most 1 head
(d) 1 head or 2 heads

Answer 1

(a) probability of getting two heads = 3/8
(b) probability of getting atleast two heads = 4/8 = 1/2
(c) probability of getting atmost one head = 3/8
(d) probability of getting 1 head or 2 heads = 6/8 = 3/4