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anonymous

  • 5 years ago

Assume a jar has 7 red marbles and 5 black marbles. Draw out 3 marbles with and without replacement. Find the requested probabilities. (a) P(3 red marbles) With replacement , without replacement . (b) P(3 black marbles) With replacement , without replacement . (c) P(one red and two black marbles) With replacement , without replacement . (d) P(red on the first draw and black on the second draw and black on the third draw) With replacement , without replacement .

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  1. amistre64
    • 5 years ago
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    12 marbles altogether

  2. amistre64
    • 5 years ago
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    slow computer today....

  3. anonymous
    • 5 years ago
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    these are the answers i got do you know if they are right? a) with 343/1728 without 21/132

  4. anonymous
    • 5 years ago
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    b)with 125/1728 with out 60/132

  5. anonymous
    • 5 years ago
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    c) I did not know how to do d) with 175/1728 without 14/132

  6. amistre64
    • 5 years ago
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    with replacement should be: 12! --- or some such formula... 7!

  7. anonymous
    • 5 years ago
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    i think its 7/12*7/12*7/12

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