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anonymous
 one year ago
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
anonymous
 one year ago
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

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Vocaloid @jim_thompson5910

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2how many gray marbles? how many marbles total?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2so 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

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2just like the last one you dealt with

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so my answer is D. ?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2you're welcome
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