Hamid has 20 T-shirts. The information shows the colours of his T-shirts.

7 black
4 dark blue
4 red
1 light blue
2 white
2 grey

Hamid is going to take one of his T-shirts at random...

A) What is the probability that the T-shirt will be grey?

B) What is the probability that the T-shirt will not be red?

C) He takes one of his blue T-shirts at random. What is the probability that the T-shirt is light blue?

PLS HELP THX SO MUCH!!!​