PERMUTATIONS AND COMBINA TIONS - NCERT
PERMUTATIONS AND COMBINATIONS 139 Definition 1 A permutation is an arrangement in a definite order of a number of objects taken some or all at a time. In the following sub-section, we shall obtain the formula needed to answer these questions immediately . 7.3.1 Permutations when all the objects are distinct
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PERMUTATIONS AND COMBINA TIONS - NCERT
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