Question

The number of marbles of different colors stored in a hat is listed below:

4 red marbles
10 green marbles
7 blue marbles

Without looking in the hat, Dan takes out a marble at random. He replaces the marble and then takes out another marble from the hat. What is the probability that Dan takes out a blue marble in both draws?

2 / 21
1 / 9
1 / 2
2 / 3

Answer 1

I need help fast, I'm being timed!!

Answer 2

@mjdennis

Answer 3

how many blue are there?

Answer 4

Seven

Answer 5

how many marbles are there in total?

Answer 6

21

Answer 7

On the first time, \(\dfrac{blue}{total}=?\)

Answer 8

7/21 ?

Answer 9

yup =1/3 right?

Answer 10

Second time around, exactly 1/3 as a result
Hence, 1/3 * 1/3 =?

Answer 11

1/ 9 ?

Answer 12

yup. done

Answer 13

Thank you!

Answer 14

np