If 20% of (P + Q) = 50% of (P - Q), then find the ratio P : Q.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 3 i.e. 7:3.
20% of (P + Q) = 50% of (P – Q)
⇒ (20/100)(P + Q) = (50/100)(P – Q)
⇒ 2(P + Q) = 5(P – Q)
⇒ 2P + 2Q = 5P – 5Q
⇒ 7Q = 3P
⇒ P/Q = 7/3
⇒ P : Q = 7 : 3