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How to identify permutation and combination? |
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Answer» PERMUTATION is for arranging the THINGS whereas combination for selection. selecting TWO nos. shall be 10C2 making nos. from two digit (including 0 at unit PLACE, just ASSUMING for sake of understanding), ans shall be selecting two nos.*arranging these two nos. + nos. formed by same nos.(11,22,33...total 10) 10C2*2P2+10 |
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