If you have five biology books and three English books (assume that they are NOT all identical- each book is different), how many ways can you arrange them on a shelf so that no more than 2 books of any subject are placed together?
For an assignment due tomorrow- I've tried every other option!
This can be a bit long. Suppose the E is the event that all English texts are together, B is the event that three of the biology texts are together, and T is the total.
Originally Posted by Sarah200488
Now your answer is where |A| is the number in event A.
|T|=(8!) and .
Can you explain those two and finish?