NDA 2024 Mathematics question

Three perfect dice are rolled. Under the condition that no two show the same face, what is the probability that one of the faces shown is an ace (one)?

(A)5/9
(B)2/3
(C)1/3
(D)1/2Correct

Answer: (D)

Solution

Outcomes in which all three dice show different faces: . Among these, outcomes containing a 1: the 1 can be on any of the 3

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Question ID VK-030009