Question

The ratio of Marks obtained for A and B is 3 : 4. If A get 30 marks less than B. Then the marks obtained by B are b) 60 a) 90 c) 120 d) 150 ​

Answer 1

Answer:

let marks be 3x and 4x

4x - 30 = 3x

4x - 3x = 30

x = 30

marks obtained by B = 4x = 4(30) = 120

c.

Answer 2

Answer:

c) 120

Step-by-step explanation:

Let the marks of A be 3x and marks of B be 4x

4x - 3x    =     30

       x      =     30

     4x      =     30 * 4

     4x      =     120

hence, B's marks = 120