Question

5 green marbles 5 red marbles 10 yellow marbles

What is the probability that the first marble is not yellow and the second one is a yellow

Answer 1

5/19

Explanation:

Marbles=20

So the probability of choosing not yellow is 10/20=1/2.

Marbles are not replaced.

The total number is 19

The probability of choosing yellow is 10/19

So the final answer is (1/2)*(10/19)=5/19.

hope this helps