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  1. If 50% of (P – Q) = 30% of (P + Q) and Q = y% of P, then the value of y is :
    1. 30
    2. 25
    3. 20
    4. 50
Correct Option: B

Given that , 50% of (P – Q) = 30% of (P + Q)

P - Q
= (P + Q) ×
30
2100

⇒ 5(P – Q) = (P + Q) × 3
⇒ 5P – 3P = 5Q + 3Q
⇒ 2P = 8Q
⇒ P = 4Q = 4 ×
P × y
100

4y
= 1 ⇒ y = 25
100



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