In how many ways can 7 different books be arranged on a self ? In how many ways three particular books are always together?
Answers
Answered by
1
7 books can be arranged in 7! ways
Let 3 books be 1 group , so now ways of arranging other 4books and this group is 5!
Now arranging those 3 books is 3! ways
So arranging 7books such that 3 particular books are always together is (5!)(3!)
Hope it helps u
Let 3 books be 1 group , so now ways of arranging other 4books and this group is 5!
Now arranging those 3 books is 3! ways
So arranging 7books such that 3 particular books are always together is (5!)(3!)
Hope it helps u
Akshaymas:
Are you sure with this answer?
Y? Is it wrong?
Similar questions