Question

A box contains
19

large marbles and
11

small marbles. Each marble is either green or white.
6

of the large marbles are green, and
5
of the small marbles are white. If a marble is randomly selected from the box, what is the probability that it is small or white?

Answer 1

9 because if you subtract 11 from 19 you get 9

Answer 2

11 - 19 equals 9 so 9