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| 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] | |