Home
Class 11
MATHS
If nP(r) = 11880 and nC(r) = 495 find...

If `nP_(r) = 11880 and nC_(r) = 495 ` find n and r .

Text Solution

Verified by Experts

The correct Answer is:
n = 12
Promotional Banner

Topper's Solved these Questions

  • COMBINATORICS AND MATHEMATICAL INDUCTION

    SURA PUBLICATION|Exercise ADDITIONAL PROBLEMS (section - C)|6 Videos

  • COMBINATORICS AND MATHEMATICAL INDUCTION

    SURA PUBLICATION|Exercise ADDITIONAL PROBLEMS (section - D)|5 Videos

  • COMBINATORICS AND MATHEMATICAL INDUCTION

    SURA PUBLICATION|Exercise ADDITIONAL PROBLEMS (section -A)|7 Videos

  • BINOMIAL THEOREM, SEQUENCES AND SERIES

    SURA PUBLICATION|Exercise ADDITIONAL PROBLEMS|10 Videos

  • DIFFERENTIAL CALCULUS - LIMITS AND CONTINUITY

    SURA PUBLICATION|Exercise ADDITIONAL PROBLEMS (SECTION - D)|4 Videos

Similar Questions

Explore conceptually related problems

If ""^(n)P_(r)=7920 and ""^nC_(r)=330 , find n and r.

If .^(n)C_(r-1)=36, .^(n)C_(r)=84 and .^(n)C_(r+1)=126 , find n and r.

If nC_(4)=495 , what is n?

If ""^(n)P_(r)=110 , then n + r =

If ""^(nP_(r)=""^(n)P_(r+1) and ""^(n)C_(r)=""^(n)C_(r-1) find n and r.

If .^(n)P_(r) = 720 . " If " .^(n)C_(r) = 120 " find " n , r

If ""^(n)p_(r)= 840 , ""^(n)C_(r) = 35 then n = ...... .

If ""^(n)p_(r)= 840 , ""^(n)C_(r) = 35 then n = ...... .