Question

You flip three coins. What is the probability that you get three tails, given that you get at least two tails?

Answer 1

Rephrase. What is the probability that you get tails on a single throw?

Answer 2

Flipping three coins and landing all tails? Well it's a 1/2 chance for each coin to land tails. The probability of landing three tails in a row is a 1/6 chance. Given 2 tails already, you would have a 1/2 chance in landing an addition tail.