21.Suppose you want to arrange your English, Hindi, Mathematics, History, Geography and Science books on a shelf. In how many ways can you do it?
Solution:
We have to arrange 6 books.
The number of permutations of n objects isn!=n.(n–1).(n–2)...2.1
Here n=6 and therefore, number of permutations is 6.5.4.3.2.1= 720
Title : Permutation And Combination Q21
Description : 21.Suppose you want to arrange your English, Hindi, Mathematics, History, Geography and Science books on a shelf. In how many ways can you...
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