3teacher shar 2 pack of paper equally

What is coefficient of the term of degree of degree 5 in the polynomial below

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?

Interpret the following expression (5y^2-7)^3/(2y)^2