Home
Class 12
MATHS
Value of r for which expression ^20Cr ^2...

Value of `r` for which expression `^20C_r ^20C_0+^20C_(r-1) ^20C_1+^20C_(r-2)^20C_2+?+^20C_0 ^20C_r` is maximum is equal to (A) `10` (B) `20` (C) `15` (D) `11`

Promotional Banner

Similar Questions

Explore conceptually related problems

Value of r for which expression 20C_(r)^(20)C_(0)+20C_(r-2)^(20)C_(1)+20C_(r-2)^(20)C_(2)+.......+20C_(0)^(20)C_(r) is maximum is equal to (A) 10 (B) 20 (C) 15 (D) 11

The value of r for which .^(20)C_(r ), .^(20)C_(r - 1) .^(20)C_(1) + .^(20)C_(2) + …… + .^(20)C_(0) .^(20)C_(r ) is maximum, is

the value of r for which .^(30)C_r.^(20)C_0+^(30)C_(r-1).^(20)C_1.....+^(30)C_0.^(20)C_r is maximum (A) 10 (B) 15 (C) 20 (D) 25

if 20C_(r-1)=20C_(r+1) then rC_(5)

Show that: .^20C_13+^20C_14-^20C_6-^20C_7=0

The sum ""^(20)C_(0)+""^(20)C_(1)+""^(20)C_(2)+……+""^(20)C_(10) is equal to :

1.^(20)C_(1)-2.^(20)C_(2)+3.^(20)C_(3)-...-20.^(20)C_(20)

The value of r(0<=r<=10)f or which(^(20)C_(0)).(^(10)C_(0))+(^(20)C_(r-1))*(1^(10)C_(1))...+(^(20)C_(0))(^(10)C_(r)) is minimum is

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