Question

What is the probability of flipping a coin and hitting heads in 8 out of 11 tries?

Answer 1

Solution:

Given: A coin flipped 11 times, thus n = number of trials = 11

We have to find:

P( Getting 8 heads ) =.............?

That is:

P(X = 8) = ..........?

Assuming a coin is fair, p = probability of getting a head = 0.5.

Thus using Binomial probability formula :

Where

and q = 1- p = 1 - 0.5 = 0.5

Thus

( Round answer to specified number of decimal places)