Question

....

Answer 1

i could swear i just saw this problem...

Answer 2

like 20 minutes ago
what class is this?

Answer 3

statisitcs...lol i think i posted it before but closed it cuz i thought i had the right answer

Answer 4

why isn't it \(4!\times 4!\)

Answer 5

oh i see why

Answer 6

\(4!\) was to arrange the authors, then each author's books have \(4!\) ways to be arranges
so i guess it is \(4!\times 4!\times 4!\times 4!\times 4!\)

Answer 7

why is it multiplied 5 times?

Answer 8

counting principle

Answer 9

4! ways to arrange the authors
then 4! ways to arrange the first author's books
4! ways to arrange second author's books
etc
counting principle says multiply all these together

Answer 10

ohh i see

Answer 11

these questions breed like rabbits http://openstudy.com/study#/updates/523d0194e4b00182897f24d9

Answer 12

thanks so much for your help!

Answer 13

yw