ncr Formula
ncr Formula
Combinations
Definition:Each of the different groups or selections which can be formed by taking some or all of a number of objects, irrespective of their arrangements, is called a combination.
Notation: The number of all combinations of n things, taken r at a time is denoted by
nCr is always a natural number.
Notation: The number of all combinations of n things, taken r at a time is denoted by
nCr is always a natural number.
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