1.

The number of permutation of n distinct objects taken r at a time in which an object is always included is (n-1)P(r-1) ×r why we multiplying these r and it is not considering in the case when one person always excluded [(n-1) Pr]

Answer» The number of permutation of n distinct objects taken r at a time in which an object is always included is (n-1)P(r-1) ×r why we multiplying these r and it is not considering in the case when one person always excluded [(n-1) Pr]


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