Question

Find the probability that the sum is 9 if it is known that one of dice shows a 4

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Answer 1

One of the dice shows = 4

To get the sum of 9 we must get 5 on another dice.

Therefore,

No. Of Required outcome = 1

Total number of outcome = 6

Probability of getting sum of 9 when one dice shows 5 =

$\frac{1}{6}$

Hope it helps.