Correct Answer - Option 2 : 2 ∶ 1
Given:
p : q : r = 3 : 4 : 5
Calculation:
Let the value of p, q and r be 3x, 4x and 5x
Substituting the values in the given expression, we get
(3x + 8x + 5x)/(9x + 4x – 5x)
⇒ 16x/8x
⇒ 2 ∶ 1
∴ The required ratio is 2 ∶ 1