Two dices are thrown simultaneously what is the probability of getting a sum of 9 or 11?

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Solution

Total number of outcomes=6*6= 36

outcomes giving some 9=(4,5),(5,4),(6,3),(3,6)

Outcomes giving some 11=(5,6),(6,5)

Therefore no of outcomes giving sum 9 or 11=6

Therefore probability of getting sum 9 or 11=6/36=1/6

And:1/6

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