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STATEMENT -1 : There are 12 points in a plane of which only 5 are collinear , then the number of straight lines obained by joining these points in pairs is ""^(12)C_(2) - ""^(5)C_(2) . STATEMENT-2: ""^(n +1)C_(r) - ""^(n-1)C_(r - 1) = ""^(n)C_(r) + ""^(n)C_(r - 2) STATEMENT -3 :2n persons may be seated at two round tables , n person seated at each , in ((2n)!)/(n^(2)) in differnet ways. |
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Answer» F T F |
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