Question

If a : b = 5 : 7 and a + b = 60, then ‘a’ is equal to?

• A. 50
• B. 48
• C. 42
• D. 25

Answer 1

Answer:

D. 25

Let a = 5x and b = 7x a + b = 60 ⇒ 7x + 5x = 60 ⇒ 12x = 60 ⇒ x = 5 a = 5 × 5 = 25