UPSC Government Jobs Exams Category

. In how many ways can a cricket eleven has to be chosen out of a batch of 15 players if
i) There is no restriction on the selection;
ii) A particular player is always chosen;
iii) A particular player is never chosen ?

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UPSC Other Question
Find the total number of ways in which 5 red and 4 white balls can be drawn out of 10 red and 9 white balls? Find the values of n and r if nPr = n P r+1 and nC r = nC r-1