Question

There 11 distinct books, among them 6 books can be arranged in a shelf. The number of
arrangements so that 3 particular books will be always side by side.​

Answer 1

Step-by-step explanation:

Arrange the 3 particular books: 3!=6 such arrangements

2: Choose 3 more books from the remaining 8: (83)=56

3: Arrange the 3 other books and the book-group…ie, arrange 4 things: 4!=24

4: Combine the previous steps: 6*56*24=8,064 total such arrangements.