The income of A, B and C are in the ratio 3 : 7 : 4 and

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The income of A, B and C are in the ratio 3 : 7 : 4 and their expenses in the ratio 4 : 3 : 5. If A saves ₹ 300 out of an income of ₹ 2,400, the savings of B and C are :

1. ₹ 4025 and ₹ 575
2. ₹ 1575 and ₹ 2.625
3. ₹ 2750 and ₹ 1.525
4. ₹ 3725 and ₹ 1.525

Correct Option: A

Let the income of A, B and C be ₹ 3x, ₹ 7x and ₹ 4x respectively and their expenses be ₹ 4y, ₹ 3y and ₹ 5y respectively.
∴ 3x = 2400
⇒ x = 800
∴ 4y = 2400 – 300 = 2100
⇒ y = 525
∴ B’s saving = (7x – 3y)
= ₹ (7 × 800 – 3 × 525)
= ₹ (5600 – 1575)
= ₹ 4025
and C’s savings = ₹ (4x – 5y)
= ₹ (3200 – 2625) = ₹ 575