What is the probability of obtaining exactly four tails in five flips of a coin given that at least 3 are tails?

Pr(4 tails | at least 3 tails) = Pr(4 tails and at least 3 tails)/Pr(at least 3 tails)

= Pr(4 tails)/Pr(at least 3 tails)

= (5/32) / (1/2) = 5/16.

Pr(4 tails | at least 3 tails) = Pr(4 tails and at least 3 tails)/Pr(at least 3 tails)

= Pr(4 tails)/Pr(at least 3 tails)

= (5/32) / (1/2) = 5/16.

Pr(4 tails | at least 3 tails) = Pr(4 tails and at least 3 tails)/Pr(at least 3 tails)

= Pr(4 tails)/Pr(at least 3 tails)

= (5/32) / (1/2) = 5/16.

Pr(4 tails | at least 3 tails) = Pr(4 tails and at least 3 tails)/Pr(at least 3 tails)

= Pr(4 tails)/Pr(at least 3 tails)

= (5/32) / (1/2) = 5/16.