Suppose you had flipped a coin 19 times and "heads" had come up each time. The probability of flipping a "head" on the 20th flip would then be
A) .50
B) .05
C) .95
D) .01

Question

Quizplus · Accepted Answer

The result of each coin flip is independent of the previous one. Therefore, the probability of flipping a "head" on the 20th flip is still .50, just like for any individual coin flip. The previous outcomes do not influence the probability of the next outcome. Therefore, the correct answer is (A) .50.

Suppose You Had Flipped a Coin 19 Times and "Heads