Question

A jar contains 7 black balls and 25 red balls. You take 2 out without replacing them. Find a)the probability of drawing 2 red balls in a row, b) the probability of
drawing a red ball, then a black ball,
c) the probability that the two balls will be of different colors

Answer 1

a) prob = (25/32)(24/31) = ..

b) prob = (25/32)(7/31) = ...

c) prob (both red) = answer to a)
prob(both black) = (7/32)(6/31) = ..

prob(different colour) = 1 - a) - both black