The schedule for the air-quality examination is fully determined if which one of the following is true?

on December 31 at 05:38AM

D vs. E

I could not eliminate D or E. Both Scenarios only allow for one configuration. D: 3-2-7-5 1-6-4-8 E: 6-3-7-5 2-8-4-1 How were you able to come up with a a different scenario for D?

1 Reply

Irina on December 31 at 07:25AM

@tomgbean,

another possible order is:

3 - 6 -7 -5
1 - 4 -2 -8