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In a bag of 20 marbles, 25% of them are red. A child chooses 4 marbles from this bag. If the child chooses the marbles

In a bag of 20 marbles, 25% of them are red. A child chooses 4 marbles from this bag. If the child chooses the marbles at random, what is the chance that the child gets all of the red marbles? Marbles are not replaced.

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