Question

find the no. of ways in which 8 people can be seated at 2 round tables with 4 people sitting at each table?

Answer 1

got it???

Answer 2

acually its like ... choose four people ...then arrange them .... permutaion means choosing and aranging

Answer 3

36

Answer 4

that dot means multiplty

Answer 5

why does the answer in my solution book say this :
7x6x5x3x2x1x2

Answer 6

wait a sec .... let me take a look at question again

Answer 7

WAIT I HAVE A WAY

Answer 8

@hba having epiphanies are we?

Answer 9

IF UR ASKED OF A ROW THEN n! IF UR ASKED ABOUT A CIRCLE OR ROUND ITS (n-1)! AND IF ITS A NECKLACE OR GARLAND ITS 1/2(n-1)!

Answer 10

IN UR CASE IT WOULD BE (8-1)! =7!

Answer 11

AND 2 TABLES SO U MULTIPLY IT BY 2 THEN

Answer 12

naaaa

Answer 13

Remember that a circular permutation is (n – 1)!

Break the seating process into "activities" like this:

1) Choose the people who are seated at each table. C(8,4 = 8•7•6•5/4•3•2•1 = 70). When you choose for 1 table the other four automatically go to the other table.

2) Arrange the 4 people at table A: (4 – 1)! = 3! = 6

3) Arrange the 4 people at table B. Also 3! =6

So answer is C(8,4)•3!•3! = 70•6•6 = 2520

Answer 14

he copied it from somewhere :D

Answer 15

anyway ... nice work @hba :D

Answer 16

You are free:

to Share — to copy, distribute and transmit the work
to Remix — to adapt the work

Answer 17

^^ LOL

Answer 18

hey @hba so you used combinations and not only permutations for this questions?

Answer 19

yeah