Question

A bag contains:

5 red marbles
4 blue marbles
2 green marbles
6 black marbles
3 yellow marbles

Answer 1

3/50

Explanation:

There are 5 + 4 + 2 + 6 + 3 = 20 marbles in the bag

P(draw a black) = 6/20 = 3/10

If the black marble is replaced, then there are 20 marbles in the bag again.

P(draw a blue) = 4/20 = 1/5

P(draw a black and blue with replacement) = (3/10)(1/5) = 3/50