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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.

Eustace , 6 Years ago
Grade 11
anser 1 Answers
Krutarth

Last Activity: 6 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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