Question

If 20% of (X+Y) = 50% of (X-Y),
then X: Y is equal to
(a) 3:7
(b) 5:7
(c) 7:3
(d) 7:5​

Answer 1

Answer:

If xy=65 , then the value of (67−5x−y5x+y) is equal to (a)17 (b) 27 (c) 37 (d) 47

Answer 2

Answer:

answer is option (c)

Step-by-step explanation:

20% of (X + Y) = 50% of (X – Y)

⇒ (X + Y) × 20/100 = (X – Y) × 50/100

⇒ (X + Y) × 2 = (X – Y) × 5

⇒ 2X + 2Y = 5X – 5Y

⇒ 5X – 2X = 5Y + 2Y

⇒ 3X = 7Y

⇒ X : Y = 7 : 3