Question

If two coins are tossed then the probability of getting at least one head is what?

Answer 1

outcomes:- (H,T) (T,T) (T,H) (H,H)

so, its clear that the probability of getting at least one head is 3/4

Answer 2

When two different coins are tossed randomly, the sample space is given by

S = {HH, HT, TH, TT}

Therefore, n(S) = 4.
Let E6 = event of getting at least 1 head. Then,
E6 = {HT, TH, HH} and, therefore, n(E6) = 3.
Therefore, P(getting at least 1 head) = P(E6) = n(E6)/n(S) = ¾.(ans).