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anonymous

  • one year ago

What is the probability that in two tosses of a die, the two numbers that turn up are the same?

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  1. anonymous
    • one year ago
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    Would I add or multiply the probabilities?

  2. SolomonZelman
    • one year ago
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    what is a die? can you explain?

  3. anonymous
    • one year ago
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    Dice= two or more dies. (Like the dies you roll in a game)

  4. anonymous
    • one year ago
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    dice you role in a game*

  5. anonymous
    • one year ago
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    Well you must first find the probability of one die, which is 1/6 since there are 6 possible outcomes. To roll the same number twice is the same probability of predicting 2 different corresponding numbers. Your prediction will not change the outcome. Therefore you must double your chances making 1/6 into 1/12. You have a 1/12 chance you will roll the same number twice in a row.

  6. anonymous
    • one year ago
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    How did you mathematically compute the 1/12?

  7. SolomonZelman
    • one year ago
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    oh ok... it's my 3rd language, sometimes see unfamiliar words. tnx:) For the first roll, you have achieved your goal successfully no matter what you get (6 possibilities out of 6 will suffice for the first roll). The second roll is that what matters. Whatever number you got for the first (lets call it x) you need to roll the second roll. So what is the probability that on a single roll (the second roll) you get a particular number x (where x is whatever you got the first roll)?

  8. anonymous
    • one year ago
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    1/6

  9. anonymous
    • one year ago
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    so is it 1/6 or 1/12?

  10. SolomonZelman
    • one year ago
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    well, the first event has probability 1. the second event has the probability of 1/6 (in this case event is a die roll) the probability of dependent events is multiplied

  11. anonymous
    • one year ago
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    1/12

  12. anonymous
    • one year ago
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    1/6 The first die roll determines a number, 1 through 6 . The odds of throwing a matching number on the second roll is 1/6 .

  13. SolomonZelman
    • one year ago
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    yup

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