Question

tom has picked up textbooks for 7 courses in how many ways can he arrange them on his bookshelf if he wants to keep the french and german texts side by side?

Answer 1

Assume french & german texts to be 1 then final number of textbooks is 6.

number of ways to arrange n objects is n!

Answer 2

do you know what n! means?

Answer 3

yes but the answer is 1440

Answer 4

hmm..
6! is 720

that answer is double that...

Answer 5

How many books does each course contains?

Answer 6

Not given

Answer 7

its reasonable to assume that there would be 1 book for each course

Answer 8

OH the 2 books could be arranged as FG and GF !!
that would make it 1440

Answer 9

agreed?

Answer 10

Yes
6factorial * 2 factorial

Answer 11

I forgot that:P

Answer 12

good question.

Answer 13

OMG thanks a lot!!!!