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20-03-2020
Mathematics

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A pair of dice is rolled. What is the probability that the sum of the dice rolled is either an 11 or a 5?

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20-03-2020

Rolling an 11:
n(A): 6&5, 5&6
n(A) = 2
Rolling a 5:
n(B): 1&4, 4&1, 3&2, 2&3
n(B) = 4

n(A) + n(B) = 4 + 2 = 6

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