Question

9. A person has 5 math books, 4 science books, and 8 literature books to be arraon a shelf. In how many ways can this be done if the books are to be grouped by the topic​

Answer 1

Answer:

2/5,4,8

2/5,2,4

2/5,1,2

2/5,1,2

5/1,1,1

2*2*2*2*5

90

Answer 2

Answer:

1,03,680 ways

Step-by-step explanation:

Arrangement is given as 5!*4!*3!*3!.

Consider all subject books together. You can arrange them in 3! ways.