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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

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  1. anonymous
    • one year ago
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    @Vocaloid @jim_thompson5910

  2. jim_thompson5910
    • one year ago
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    how many gray marbles? how many marbles total?

  3. anonymous
    • one year ago
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    9 gray and 38 total

  4. jim_thompson5910
    • one year ago
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    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

  5. jim_thompson5910
    • one year ago
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    just like the last one you dealt with

  6. anonymous
    • one year ago
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    so my answer is D. ?

  7. jim_thompson5910
    • one year ago
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    yeah

  8. anonymous
    • one year ago
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    thanks!

  9. jim_thompson5910
    • one year ago
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    you're welcome

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