Question

There are 7 yellow marbles, 6 blue marbles, 5 green marbles and 3 red marbles. What is the probability of drawing a red and then a blue marble

WITHOUT replacement?

Answer 1

3/70

Explanation:

P(R,B) no replacement: 3/21 x 6/20 = 1/7 x 3/10 or 3/70 reduced