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) 3/8
(b) 4/8 = 1/2
(c) 3/8
(d) 6/8 = 3/4

Answer 2

(a) 3/8. (b) 4/8. (C) 2/8. (D) 6/8