Question

Jane has 38 marbles of the same shape and size in a box. The colors and amounts of the marbles are shown below:

14 white marbles
9 gray marbles
15 blue marbles

Without looking in the box, Jane takes out a marble at random. She then replaces the marble and takes out another marble from the box. What is the probability that Jane takes out a gray marble in both draws?
9 /38 x 8 / 37 = 72 / 1406
9 / 38 + 8 /37 = 637 / 1406
9 / 38 + 9 / 38 = 684 / 1444
9 / 38 x 9 / 38 = 81 / 1444

Answer 1

@Vocaloid @jim_thompson5910

Answer 2

how many gray marbles?
how many marbles total?

Answer 3

9 gray and 38 total

Answer 4

so the probability of picking 1 gray is 9/38

if we replace the marble, then the probability of picking 2 gray is (9/38)*(9/38)

we just multiply the individual probability

Answer 5

just like the last one you dealt with

Answer 6

so my answer is D. ?

Answer 7

yeah

Answer 8

thanks!

Answer 9

you're welcome