Which of the following is more probable? Answer A, B, or same.
A) Flipping a coin 3 times and obtaining at least 2 heads.
B) Flipping a coin 4 times and obtaining at least 2 heads.

Question

Quizplus · Accepted Answer

The probability of obtaining at least 2 heads in 3 coin flips is 1/8 + 3/8 + 3/8 = 7/8, while the probability of obtaining at least 2 heads in 4 coin flips is 1/16 + 4/16 + 6/16 + 4/16 = 15/16. Therefore, it is more probable to obtain at least 2 heads in 4 coin flips.

Which of the Following Is More Probable? Answer A, B