cjacks14 cjacks14
  • 13-06-2016
  • Mathematics
contestada

a die is rolled 20 times. find the probability of getting four 2's out of 20 attempts

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874216812
874216812 874216812
  • 13-06-2016
P(get 2's) = 1/6
P(not 2's) = 5/6
p= (1/6)^4  *  (5/6)^16 = 4.17 * 10^-5
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charles13 charles13
  • 13-06-2016
Maybe divide 20 by 4 and your answer should be 5 times.

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