If `a*b=2a-3b+a b` , then `3*5+5*3` is equal to (a) 22 (b) 24 (c) 26 (d) 28

If a*b=2a-3b+ab , then 3*5+5*3 is equal to:

If sqrt(18xx14xx x)=84, then x equals (a)22 (b) 24(c)28 (d) 32

If (a+b+2c+3d)(a-b-2c+3d)=(a-b+2c-3d)(a+b-2c-3d) , then 2b c is equal to 3/2 (b) (3a)/(2d) (c) 3a d (d) a^2d^2

If ( 3a+ 5b)/(3a- 5b) = 5 , then a: b is equal to

If a+b=5 and 3a+2b=20, then (3a+b) will be: (a)10 (b) 15 (c) 20 (d) 25

If a: b= 3:5 and b:c = 7:8, then 2a :3b: 8c is equal to

If a : b = 2: 5 , then ( 3a+ 4b) : (5a +6b) is equal to

If A=[(5a, -b),(3,2)] and A adj A=A A^T, then 5a+b is equal to: (A) -1 (B) 5 (C) 4 (D) 13