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Question

A fair die is rolled. Find the probability of getting a prime factor of 3.

A
16
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B
56
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C
13
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D
12
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Solution

The correct option is A 16
In rolling a die, the sample space, S={1,2,3,4,5,6}
Therefore, n(S)=6
Let C be the event of getting a prime factor of 3.
C={3}
Therefore, n(C)=1
P(C)= n(C)n(S)=16

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