Question

What is the probability of flipping a coin 8 times and getting heads 3 times? Round your answer to the nearest tenth of a percent.
A. 10.9%
B. 27.3%
C. 21.9%
D. 3.1%

Answer 1

Answer:

21.9%

Step-by-step explanation:

This involves binomial probability.

n = # of tries:  8

x = # of successes (heads):  3

Use your calculator's probability distribution function binompdf.

Type in binompdf(n, p, x), which in this case would be:

             bionompdf(8, 0.5, 3) = 0.219, or 21.9% (Answer C)