Home
Class 12
MATHS
If ^n Pr=^n P(r+1)a n d^n Cr=^n C(r-1,) ...

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.

A

2

B

3

C

4

D

5

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 5|18 Videos

  • PERMUTATIONS AND COMBINATIONS

    ARIHANT MATHS|Exercise Exercise For Session 6|28 Videos

  • PERMUTATIONS AND COMBINATIONS

    ARIHANT MATHS|Exercise Exercise For Session 3|11 Videos

  • PARABOLA

    ARIHANT MATHS|Exercise Exercise (Questions Asked In Previous 13 Years Exam)|36 Videos

  • PROBABILITY

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

Similar Questions

Explore conceptually related problems

If ^(n)P_(r)=^(n)P_(r+1) and ^(n)C_(r)=^(n)C_(r-1, then the ) value of n+r is.

If ""^(n)P_r = ""^(n)P_(r+1) and ""^(n)C_r = ""^(n)C_(r-1) ,then the values of n and r are

If ""^(n)P_(r) = ""^(n)P_(r+1) and ""^(n)C_(r) = ""^(n) C_(r-1) then the value of r is equal to

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

If ^(n+1)C_(r+1): ^nC_r: ^(n-1)C_(r-1)=11:6:2 find the values of n and r.

If .^(n)C_(r-1): .^(n)C_(r): .^(n)C_(r+1)=3:4:5 , find the values of n and r.