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Questions  

Three identical dice are rolled. The probability that the same number will appear on each of them is

a
16
b
136
c
118
d
328

detailed solution

Correct option is B

Favorable cases are {(1, 1, 1), (2,2,2), .……. (6,6,6)}. The number of favorable cases is 6. The total number cases is 6 x 6 x 6 = 216. Therefore, the required probability is  1/36.

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A bag contains 10 different balls. Five balls are drawn simultaneously and then replaced and then seven balls are drawn. If the probability that exactly three balls are common to the two draws is p, then the value of 8p is ________.


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