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Needhelpp101

  • 3 years ago

A dice is rolled 20 times and the number of twos that come up is tallied. Find the probability of getting exactly four twos. A. 0.202 B. 0.075 C. 0.101 D. 0.083

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  1. jim_thompson5910
    • 3 years ago
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    This is a binomial probability distribution problem so you'll use the formula P(X = k) = (n C k)*(p)^k*(1-p)^(1-k)

  2. jim_thompson5910
    • 3 years ago
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    in this case, n = 20 p = 1/6 = 0.16667 k = 4

  3. Needhelpp101
    • 3 years ago
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    hmmm. ok

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