Question

A box contains 30 marbles, of which 8 are

black, 10 are green, and 12 are yellow. If two
marbles are drawn at random, what is the
probability that both the marbles will NOT be
green?

Answer 1

4/9

Explanation:

'ng' = not green

P(ng,ng) = 2/3 x 2/3 = 4/9