Home
Class 12
MATHS
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:
` :. n = 10 and r = 4`.
Promotional Banner

Topper's Solved these Questions

  • MODEL PAPER 8

    VGS PUBLICATION-BRILLIANT|Exercise SECTION -B (SHORT ANSWER TYPE QUESTIONS)|7 Videos

  • MODEL PAPER 8

    VGS PUBLICATION-BRILLIANT|Exercise SECTION -C (LONG ANSWER TYPE QUESTIONS)|7 Videos

  • MODEL PAPER 7

    VGS PUBLICATION-BRILLIANT|Exercise SECTION - C (LONG ANSWER TYPE QUESTIONS)|7 Videos

  • MODEL PAPER 9

    VGS PUBLICATION-BRILLIANT|Exercise SECTION-C (III. LONG ANSWER TYPE QUESTIONS) |7 Videos

Similar Questions

Explore conceptually related problems

If ""^(n)P_(4)=210 , find n.

If ""^(n)P_(r)=30240 and ""^(n)C_(r)=252 then the ordered pair (n,r)=

If ""^(n)C_(4)=210 then find n.

If ""^(n)P_(r)=3024 then (n,r) is

IF ""^(n)P_(r)=840,""^(n)C_(r)=35 then n=

IF ""^(n) P_(r)=720,""^(n)C_(r)=120 then (n,r) =

If ""^(n)C_(r-1)=36,""^(n)C_(r)=84 and ""^(n)C_(r+1)=126 , then r is equal to

If ""^(n)P_(r)=""^(n)P_((r+1)) and ""^(n)C_(r) = ""^(n)C_(r-1), then (n,r) =