A die is rolled twice and the sum of the numbers appearing on them is observed to be 7. What is the conditional probability that the number 2 has appeared at least once?

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Shiksha Nation · Accepted Answer

Consider the following events:A = Getting number 2 at least once;B = Getting 7 as the sum of the numbers on two diceWe have,

A die is rolled twice and the sum of the numbers appearing on them is observed to be 7. What is the conditional probability that the number 2 has appeared at least once?

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