Question

Steve reaches into a bag with 5 red marbles, 3 yellow marbles, and 2 green marbles, and randomly selects one. Then, he puts the marble back, and Sam reaches into the same bag and randomly selects a marble. What is the probability that both guys selected a yellow marble.

You have to answer correctly to recieve all 50 points

Answer 1

0.09

Explanation:

Total: 5+3+2 = 10

3/10 × 3/10

9/100

0.09

Answer 2

5 + 3 + 2 = 10 total marbles.

Steve picking a yellow one would be 3/10 (3 yellow / 10 total)

The marble is put back, so there will still be 7 marbles in the bag.

Sam picking a yellow one would then be the same as Steve: 3/10

The probability of them both picking yellow would be 3/10 x 3/10 = 9/100