Question

A bag contains 2 green balls, 3 yellow balls, and 1 red ball. Simone randomly selects a ball and replaces it. She repeats this process two more times. Each time she selects the red ball. What is the probability Simone will select the red ball on her fourth attempt?


1
6


1
4


4
6


3
4

Answer 1

1/6

Because the draws are with replacement, each draw is independent and the probability of red on any draw is 1 red out of 6 total balls = 1/6.