A box contains 12 large marbles and 20 small marbles Each ma

A box contains 12 large marbles and 20 small marbles. Each marble is either green or white. 4 of the large marbles are green, and 15 of the small marbles are white. If a marble is randomly selected, what is the probability that it is small or white? Please show your work.

Solution

Total number of marbles = 20 + 12 = 32

Large, green marbles = 4

Large, white = 12