The ratio of marks of A and B is 3 : 4 and the ratio of marks of B and C is 4 : 5. If the difference in the marks of C and A is 30, then how many marks does B get?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 60.
Calculations:
The ratio of marks of A and B is 3 : 4 and the ratio of marks of B and C is 4 : 5.
Equalising B on both sides we get -
⇒ A : B : C = 3 : 4 : 5
Let the number of marks of A, B, and C be 3x, 4x and 5x.
According to the question;
⇒ 5x - 3x = 30
⇒ 2x = 30
⇒ x = 15
Marks of B = 4x = 4 × 15 = 60