Question

Suppose that 90% of people are right handed. What is the probability that at most 6 of a random sample of 10 people are right-handed?

Answer 1

A person can be either right-handed or left-handed.

It is given that 90% of the people are right-handed.

Using binomial distribution, the probability that more than 6 people are right-handed is given by,

Therefore, the probability that at most 6 people are right-handed = 1 − P (more than 6 are right-handed)