The brand name of a certain chain of coffee shops has a 50% recognition rate in the town of Coffleton. An executive from the company wants to verify the recognition rate as the company is Interested in opening a coffee shop in the town. He selects a random sample of 9 Coffleton Residents. Find the probability that the number that recognize the brand name is not 4.
A) 0.754
B) 0.164
C) 0.246
D) 0.00195

Question

Quizplus · Accepted Answer

The probability that exactly 4 out of 9 recognize the brand is calculated using the binomial probability formula. The probability of not getting exactly 4 is 1 minus this probability, which is approximately 0.754.

The Brand Name of a Certain Chain of Coffee Shops