The probability that a person will have 0, 1, or 2 dental checkups per year is 0.2, 0.5, and 0.3, respectively. If seven people are picked at random, what is the probability that two will have no
Checkups, four will have one checkup, and one will have two checkups in the next year?
A) 0.079
B) 0.013
C) 0.008
D) 0.043

Question

Quizplus · Accepted Answer

The probability of having 0, 1, or 2 checkups is 0.2, 0.5, and 0.3, respectively. The probability of having two people with no checkups, four people with one checkup, and one person with two checkups is (0.2)^2 * (0.5)^4 * (0.3)^1 = 0.079.

The Probability That a Person Will Have 0, 1, or 2