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A card from a pack of 52 cards is lost ....

A card from a pack of 52 cards is lost . From the remaining cards of the pack , two cards are drawn are are found to be diamonds. Find the probability of the lost card being a diamond ?

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The correct Answer is:
`= (12xx11)/(12xx11+13xx12xx3)=(132)/(132+468)=(132)/(600)=(11)/(50)` .
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