Home
Class 12
MATHS
If ""^(18)C(r)=""^(18)C(r+2) then ""^(R...

If `""^(18)C_(r)=""^(18)C_(r+2)` then `""^(R )C_(5)`=

A

56

B

63

C

48

D

74

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • PERMUTATIONS & COMBINATIONS

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE 2 ( SPECIAL TYPE QUESTIONS ) SET -1|9 Videos

  • PERMUTATIONS & COMBINATIONS

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE 2 ( SPECIAL TYPE QUESTIONS ) SET -2|5 Videos

  • PERMUTATIONS & COMBINATIONS

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE 1A (PERMUTATIONS )|199 Videos

  • PARTIAL FRACTIONS

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE 2 SET - 4|2 Videos

  • PROBABILITY

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE 2 (SPECIAL TYPE QUESTIONS) SET-4|5 Videos

Similar Questions

Explore conceptually related problems

IF ""^(15)C_(r+3)=""^(15)C_(2r-3) , then r=

If ""^(12)C_(r+1)=""^(12)C_(3r-5), find r.

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

If ""^(n)C_(r)=""^(n)C_(r-1) and ""^(n)P_(r+1) = 9 .""^(n)P_(r) then (n,r)=

If ""^(15)C_(2r-1)=""^(15)C_(2r+4) , find r.

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

IF ""^(n) C_((r-1))=36 ,""^(n)C_(r)=84 , ""^(n)C_(r+1)=126 , then r=

Show that 1sum_(r =0)^(50) (""^(100)C_( r))*(""^(200)C_(150+r ))=""^(300)C_(50)