Question

17% of students in a class have brown hair. If 6 students are chosen at random, what is the probability that exactly 3 have brown hair? (Write your answer as a percentage rounded to the nearest tenth.)​

Answer 1

6.8%

Explanation:

the question has no information about class size (no. of student in class)

assume no. of student is infinite

P(3brown out of 6) = 6C3 * P(brown)^3 * P(not brown)^3

= 20 * 0.004913 * 0.695789

= 0.06837