Question

Suppose you decide to keep flipping a coin until tails came up, at which point you would stop. What is the probability of tails coming up on the 4th flip of the coin? Round your answer to the nearest tenth of a percent.

Answer 1

on the fourth flip, or for the first time on the fourth flip? not clear

Answer 2

12.5

Answer 3

oh for the first time on the fourth flip \[\left(\frac{1}{2}\right)^4\]

Answer 4

T, T, T, H

Answer 5

or rather H, H, H, T
(same probability)