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From a given no.of 4n books, there are 3 sets of n identical books on physics, chemistry and maths. The remaining n books are different on the other subjects. Find the number of ways of selecting n books out of 4n books.

From a given no.of 4n books, there are 3 sets of n identical books on physics, chemistry and maths. The remaining n books are different on the other subjects. Find the number of ways of selecting n books out of 4n books.

Grade:11

1 Answers

Krutarth
38 Points
3 years ago
you have to multiply 4 and 3 to get 12 ...its similar like u have 2 pants and 1 shirt   ..in how many ways can u wear it ..ans =2x1 =2

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