Question

There are three different colored M&Ms-- Red, green and white. The probability of selecting a red M&M is 2/5, and the probability of selecting a green M&M is 1/4, so what is the probability of selecting a white M&M?

Answer 1

7/20

Explanation:

Let the total probability be 1;

Given

Probability of selecting a red M&M = 2/5,

Probability of selecting a green M&M = 1/4

Required

Probability of selecting a white M&M

Probability of selecting a white M&M = 1 - (2/5+1/4)

Probability of selecting a green M&M = 1 - (4(2)+5(1)/20)

Probability of selecting a green M&M = 1 - (8+5/20)

Probability of selecting a green M&M = 1 - 13/20

Probability of selecting a green M&M = 7/20

hence the Probability of selecting a green M&M is 7/20