Practice Final B1
Lilyhui
I split the question into two generations of choices: # of places the reserved seats are *ways to order the four people. 7*4!
edelapena: March 19, 2015, 6:56 p.m.
I got (7-3+1) * 4! places of seats (I count the reserved seat as one seat) * ways to order four people
PeterH: March 19, 2015, 7:08 p.m.
I got 7*4! too.
Lilyhui: March 19, 2015, 7:28 p.m.
If you draw a circular table and label the seats from 1-7 then assign three different reserved seats starting from 123, 234, ....671, 712. you should get 7 different possibilities for the reserved seats
Soniakumr: March 19, 2015, 8:15 p.m.
I also got 7*4!