An alloy contains copper, zinc and nickel in the ratio of

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An alloy contains copper, zinc and nickel in the ratio of 5 : 3 : 2. The quantity of nickel (in kg) that must be added to 100 kg of this alloy to have the new ratio 5 : 3 : 3 is

1. 8
2. 10
3. 12
4. 15

Correct Option: B

Let x kg of nickel be mixed.

∴	20 + x	=	3
	100 + x		11

⇒ 220 + 11x = 300 + 3x
⇒ 11x – 3x = 300 – 220
⇒ 8x = 80
⇒ x = 10 kg.