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!!!

You are assembling pieces of an iron gate to complete a fence. the finished gate will look like the one below. in order to assemble the gate it is important to under how the pieces are related. part 1: how are pies 1 and 2 in the archway related? part 2: how are the rectangular sections 5 and 6 in the center of the gate related to each other?

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?

The base of a rectangular pyramid is 13 inches long and 12 inches wide. the height of the pyramid is 8 inches. what is the volume of the pyramid