self Maths Puzzle


If five dice are thrown simultaneously, what is the probability of getting the sum as seven?

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self Other Question

A box contains 9 red toys, 7 green toys and 9 blue toys. Each ball is of a different size. The probability that the red ball being selected is the smallest red toy, is:
There are three events A, B and C, one of which must and only can happen. If the odds are 8:3 against A, 5:2 against B, the odds against C must be?