Home
Class 11
MATHS
if 20C(r-1)=20C(r+1) then rC5...

if `20C_(r-1)=20C_(r+1)` then `rC_5`

Promotional Banner

Similar Questions

Explore conceptually related problems

If 20C_(r+1)=^20C_(r-1) , then r is equal to:

If ^(20)C_(r+1)=^(20)C_(r-1), then r is equal to a.10 b.11 c.19d.12

If .^(20)C_(r+1)=.^(20)C_(r-1) then find the value of .^(10)C_(r) .

If 20C_(r) = 20C_(r-10) than 18C_(r)=

If 20C_r=^20C_(r+4) , then rC_3 is equal to:

If .^(20)C_(r)=.^(20)C_(r-10) then find the value of .^(17)C_(r) .

If ^(20)C_(r)=^(20)C_(r+4), then ^(r)C_(3) is equal to a.54 b.56c.58d .none of these

If ^20C_r=^20C_(r+4) then prove that ^rC_2=28

""^(20)C_(r) =""^(20)C_(r-10), then find the value of ""^(18)C_(r)

If ""^(20)C_(r)=""^(20)C_(r-10) , then ""^(18)C_(r) is equal to