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anonymous

  • 5 years ago

If you roll a number cube 12 times, about how many times would you expect to roll a 5 or 6? A. 2 B. 5 C. 4 D. 10

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  1. anonymous
    • 5 years ago
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    merry, u hav any guess on how to do this one?

  2. anonymous
    • 5 years ago
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    :(

  3. anonymous
    • 5 years ago
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    a dice hav 6possible outcome. so probability 5or6 occur: p(5 or 6)= 1/6+1/6= 1/3 since it rolled 12times, expected number of 5or6 occur is: E(5 or 6)= 1/3*12= 4

  4. anonymous
    • 5 years ago
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    thats exactly what i guessed

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spraguer (Moderator)
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