Norma bought a plastic bag that contains 100 ballons the lable says that there are 20 each of blue, yellow, red, ,green and orange ballons what is the probability that the ballon will be either red or blue?

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap