Question

A coin is being flipped 400 times. What is the probability of it landing on heads at most 170 times, rounded to the nearest tenth of a percent?
"at most" is throwing me... what is the formula?

Answer 1

Hello!

We have two probabilities we can use; we have 170/400, for our experiment, and 1/2, which is our theoretical probability.

To solve, we just multiply the two probabilities.

=0.2125≈21.3

Therefore, we have about a 21.3% chance of this event occurring.

I hope this helps!

Gratitude Attitude : THANKS!