`15 C_3+^(15)C_5+........+^(15)C_15` will be equal to

""^(15)C_(8) + ""^(15)C_(9) - ""^(15)C_(6) - ""^(15)C_(7) is equal to ………. .

""^(15)C_(8) + ""^(15)C_(9) - ""^(15)C_(6) - ""^(15)C_(7) is equal to ………. .

If (1+x)^(15)=C_0+C_1x+C_2x^2+……..+C_(15)x^(15) then ,^15C_0^2-^15C_1^2+^15C_2 ^2 -^15C_3 ^2 +……-^15C_(15) ^2 is equal to

If \ ^(15)C_(3r)=\ \ ^(15)C_(r+3)\ then\ r is equal to a. 5 b. 4 c. 3 d. 2

((22pi)/15)^c is equal to

Value of -^(15)C_(1) + 2..^(15)C_(2)- 3.^(15)C_(3) + ...... - 15.^(15)C_(15)+ ^(15)C_(1)+ ^(15)C_(2)+ ....^(15)C_(14) is

""^(15)C_(8)+""^(15)C_(9)-""^(15)C_(6)-""^(15)C_(7) is equal to