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Nine books, consisting of four Mathematics books, three Physics books, and two Chemistry books, they are arranged in a shelf at random. What is the probability that the books of each kind are all together?
1/2
1/10
1/21
1/210
The probability that the books of each kind are all together is = 4! × 3! × 2! × 3!/9! = 1/210
By: bhavesh kumar singh ProfileResourcesReport error
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