3 posts • Page 1 of 1
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- Joined: Mon Aug 24, 2009 3:26 pm
The question is just asking how many different pairings for flight 4 there are within the realm of acceptable solutions. Among the pilots, only G and L can be assigned to flight 4. L must be paired with U (fourth rule), so that accounts for one acceptable pairing. G can be paired with any one of R, S, and T, accounting for the other three.