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If ""^(n)P(r)=5040 and ""^(n)C(r)=210, f...

If `""^(n)P_(r)=5040 and ""^(n)C_(r)=210,` find n and r.

Text Solution

Verified by Experts

The correct Answer is:
`therefore n=10`
`therefore n=10, r =4`
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