Question

You toss 3 coins. What is the probability that you get exactly 3 heads, given that you get at least one tail? A tree diagram will help you to answer this question.

Answer 1

Out of 3 coins, if you are given that 1 is on tails, then the most heads you could have is 3 coins - 1 tails = 2 heads.

The probability of getting 3 heads would be 0.