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Quantitative Aptitude

Mixture & Alligations

The ratio of ...

Question

The ratio of copper and zinc is 9 : 3 in an alloy. If quantity of zinc is 24 kg. the quantity of copper would be ?

A

8

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B

10

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C

12

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D

None

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Solution

The correct option is A
8

Ratio of copper and zinc is 9 : 3 Let the required quantity of copper be x kg. So, 9 : 3 : 24 : x 9x = 24 x 3 x = $\frac{72}{9 x}$ = 8 kg

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