Find the nomof ways in which 3 numbers in a.p can be selected from 1,2,3........,21. From permutations and combinations chapter can any one give answer with better explanation plzzzzzz
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Find the nomof ways in which 3 numbers in a.p can be selected from 1,2,3........,21. From permutations and combinations chapter can any one give answer with better explanation plzzzzzz
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