A fast food chain store conducted a taste survey before marketing a new hamburger. The results of the Find the probability that at least six of the eight customers will like this hamburger

Question

A fast food chain store conducted a taste survey before marketing a new hamburger. The results of the survey showed that 75% of the people who tried this hamburger liked it. Encouraged by this result, the company decided to market the new hamburger. On a certain day, eight customers bought it for the first time. Find the probability that at least six of the eight customers will like this hamburger

Answer 1

This appears to be a binomial distribution with n = 8 and p = 0.75

Probability that at least six of the customers like the hamburger

= P (X ≥ 6)

= 1 - P (X ≤ 5)

= 1 - binomcdf (8, 0.75, 5)

= 1 - 0.3215

= 0.6785