total marbles: 2+3+1+2+2 = 10
P(pink,black) = 1/10 * 2/9
P(black,pink) = 2/9 * 1/10
now add 'em up, since these are mutually exclusive events.
If there are 2 yellow, 3 purple, 1 pink, 2 orange, and 2 black marbles in a bag, find the
probability of randomly selecting a pink and a black marble.
1 answer
1 answer