Question

A coin is weighted so that the probability of getting heads is 0.70. If the coin is flipped twice, what is the probability of getting a tail followed by a head?

Answer 1

HH
TT
HT
TH

these are all the outcomes of flipping a coin twice:

TH = 0.7*0.3 = 0.21
because the probability of getting tails is 0.7 and the probability of getting heads is 0.3.