Question

Two different coins are tossed simultaneously, What is the probability of getting at least one head?

Answer 1

The sample space,

S = {(H, H), (H, T), (T, H), (T, T)}

∴ n(S) = 4

A is an event (getting at least one head)

∴ A = {(H, T), (T, H), (H, H)} or n(A) = 3

Thus, probability of getting at least one head

= `(n(A))/(n(S))`

= `3/4`