Question

There are five marbles in a bag. Three are green, and two are yellow. You draw a marble, do not replace it, and then draw another. What is the probability of choosing two yellow marbles

Answer 1

2out of 20

Explanation:

Answer 2

1/10

Explanation:

P(1st marble yellow) = Number of yellow / total

= 2/5

We keep the marble. Now there are four marbles in a bag. Three are green, and one is yellow.

P(2nd marble yellow) = Number of yellow / total

=1/4

P (1st yellow, keep, 2nd yellow) = 2/5 * 1/4

= 2/20 = 1/10