On a shelf there are 4 books on Economics, 3 books on Management and 4 books on Statistics. In how many different ways can the books be arranged so that the books on Economics are kept together?

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Anonymous

Asked: January 14, 20222022-01-14T11:24:11+05:30 2022-01-14T11:24:11+05:30Category: Number Puzzles

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Mighty Ashish · Answer 1 · 2022-01-14T11:24:34+05:30

Explanation:

Books on Economics are to be kept together. Hence, we are to arrange 3 books on management, 4 books on Statistics and one book on Economics.

These can be arranged in 8! ways.

Again, 4 books on Economics can be arranged together in 4! ways.

Therefore, Total number of arrangements = 8! × 4! = 967680

[n!=1,2,3,4……(n−)(n)]