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Cardinality of Sets

A box contain...

Question

A box contains coins and jewels of either gold or silver. If 30% of the objects in the box are coins and 40% of jewels are silver, what percentage of objects in the box are gold jewels?

A

60%

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B

70%

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C

42%

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D

28%

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Solution

The correct option is C 42%

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