A box oforanges is inspected by examinin...

A box oforanges is inspected by examining three randomly selected oranges drawn without replacement. If all the three oranges are good, the box is approved for sale, otherwise, it is rejected. Find the probability that a box containing 15 oranges out of which 12 are good and 3 are bad ones willI be approved for sale.

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The correct Answer is:

`(44)/(91)`

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A box contains 12 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball? If 6 more black balls are put in the box, the probability of drawing a black ball is now double of what it was before. Find x.

NEW JOYTHI PUBLICATION-PROBABILITY-QUESTIONS FROM COMPETITIVE EXAMS

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