2 Answers | Add Yours
There are 8 students in total of which 4 are men and the rest women. When 4 students are randomly picked from this group, the probability that the number of men equals the number of women has to be determined.
The desired probability is given by: (number of favorable events)/(total number of events)
If the number of men and women selected is equal, 2 men out of the four is selected and 2 women out of the 4 is selected. This can be done in C(4, 2)*C(4,2) = 6*6 = 36 ways. The number of ways of selecting 4 students from a group of 8 is C(8, 4) = 70
This gives a probability of 36/70 that an equal number of men and women are selected.
The probability that the random sample of 4 has an equal number of men and women is 18/35.
We’ve answered 287,720 questions. We can answer yours, too.Ask a question