The soccer team's shirts have arrived in a big box and people start grabbing them. The box contains 7 medium, 12 Large, and 11 extra-large shirts.

What is the probability that the first 4 shirts are all extra large?

I have been struggling with the problem for an hour and can't seem to figure out the answer...

1 answer

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.

First shirt = category/total = 11/30

Second shirt, since one XL shirt is gone = 10/29

Third shirt, since two XL are gone = 9/28

Fourth shirt = ?

11/30 * 10/29 * 9/28 * ? = ?