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Class 11

Math

Algebra

Permutations and Combinations

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In a library, there are m books of mathematics and n books of natural science. They can be placed on a shelf in ways so that the books of the same subject are not separated.If . then m

Correct Answer: Option(b)
Solution: Mathematics books and natural science books could permute in m! and n! way and we could arrange them in 2!
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By trial and error, 
 
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