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# Engineering

Screenshot_1336.png Two dice are thrown together The probability that sum of the numbers appearing on them is 9, if it is known that the number 5 always occurs on the first dice is :

Answers (1)
A Anurag Uikey
@Santosh the outcome on first dice is fixed, so you need 4 on the second dice to get sum 9,that's why the probability of getting 4 on a dice is 1/6.In a way you arr throwing one dice only and you need 4 in order to get sum=9.

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