A box contains 2 blue caps, 4 red caps, 5 green caps and 1 yellow cap. If three caps are picked at random without replacement, what is the probability that two are red and one is green?
A box contains 2 blue caps, 4 red caps, 5 green caps and 1 yellow cap. If three caps are picked at random without replacement, what is the probability that two are red and one is green?
Solution
✅ Correct Option: 4
Using the combination formula , the number of ways to pick any 3 caps is
We want 2 red out of the 4 red, and 1 green out of the 5 green: