Home
Class 12
MATHS
If .^(n)P(5)=20 .^(n)P(3), find the valu...

If `.^(n)P_(5)=20 .^(n)P_(3)`, find the value of n.

A

4

B

8

C

6

D

7

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • PERMUTATIONS AND COMBINATIONS

    ARIHANT MATHS|Exercise Exercise For Session 3|11 Videos
  • PERMUTATIONS AND COMBINATIONS

    ARIHANT MATHS|Exercise Exercise For Session 4|18 Videos
  • PERMUTATIONS AND COMBINATIONS

    ARIHANT MATHS|Exercise Exercise For Session 1|11 Videos
  • PARABOLA

    ARIHANT MATHS|Exercise Exercise (Questions Asked In Previous 13 Years Exam)|35 Videos
  • PROBABILITY

    ARIHANT MATHS|Exercise Exercise (Questions Asked In Previous 13 Years Exam)|55 Videos

Similar Questions

Explore conceptually related problems

If .^(m+n)P_(2)=90 and .^(m-n)P_(2)=30 , find the value of m and n is equal to.

If .^(n)P_(3)+.^(n)C_(n-2)=14n , the value of n is

If ""^(2n+1)P_(n-1): ""^(2n-1)P_n =3:5 then the value of n equals :

If .^(m+n) P_(2)=56 and .^(m-n)P_(3)=24 , then (.^(m)P_(3))/(.^(n)P_(2)) equals

Consider a polygon of sides 'n' which satisfies the equation 3*.^(n)P_(4)=.^(n-1)P_(5) . Q. Number of quadrilaterals that can be made using the vertices of the polygon of sides 'n' if exactly two adjacent sides of the quadrilateral are common to the sides of the n-gon is

If .^(n+5)P_(n+1)=.^(11(n-1))/2,^(n+3)P_(n) "then n is equal to" .

If ^n P_r=^n P_(r+1)a n d^n C_r=^n C_(r-1,) then the value of n+r is.

If the sum of n terms of an A.P. is 3n^2 + 5n and its m^(th) term is 164, find the value of m.

If .^(2n+1)P_(n-1):^(2n-1)P_(n)=7:10 , then .^(n)P_(3) equals