Question

Two coins are tossed simultaneously. What is the probability of getting at most one head?

Answer 1

When two coins are tossed simultaneously then the possible outcomes obtained are {HH, HT, TH, and TT}.

Here H denotes head and T denotes tail.

Therefore, a total of 4 outcomes obtained on tossing two coins simultaneously.

Number of favourable outcome(s) for no head is {TT}

Number of favourable outcome(s) for one head is {HT, TH}

Therefore, the event of getting at most one head has 3 favourable outcomes. These are TT, HT and TH.

Therefore, the probability of getting at most one head = 3/4.