Suppose it is known that 10% of the students in a class wear glasses. If 8 students are selected at random what is probability that

Question: Suppose it is known that 10% of the students in a class wear glasses. If 8 students are selected at random what is probability that

(i) two students wear glasses.
(ii) none of those selected wear glasses
(iii) all those selected wear glasses.

Solution:

Here, the probability of a student wearing glasses would be 0.10. Now, q = 0.90 and n = 8. The desired probabilities will be calculated as follows:

Proability homework