Perms&Cons help (1 Viewer)

[leonmfps]

No answers to these sorry.

1. A group of 12 people is to be seated at a long table with 6 seats each side.
There are 4 people who wish to be on one side of the table and 3 people who wish to
be on the other side. How many seating arrangements are there?

2. How many sets of 5 bands can be formed from 5 lead guitars, 5 bass guitars, 5
drummers and 5 pianists, if each band has to have at least one player of each
instrument.

Appreciate any help.

 

[davidgoes4wce]

Do you have any answers? So I can compare

 

[davidgoes4wce]

My bad I misread your opening line.

 

[leonmfps]

I discussed this with my teacher and he confirmed the answers were these:
1. 6P4*6P3*5! or 2*6P4*6P3*5! (depending on whether the side matters, since the question was too vague)
2. [(5C1)^4 * (4C1)^4 * (3C1)^4 * (2C1)^4]/5!



Sorry for the late reply