LG Game 1 Question 2 Explanation, by LSATHacks
There are two ways to solve this. If you made scenarios, you can look at those and notice that every bill except 2 could be paid on Wednesday. C is CORRECT.
Or you can eliminate the answers using the rules.
We know both 1 and 5 can be on Wednesday. They’re always paid on different days, and they’re interchangeable. Interchangeable variables can go in either group. So A and B are wrong because they don’t include both 1 and 5.
D and E are wrong because 2 can never go on Wednesday (third rule).
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Rule 1 states that Wednesday must have either 3 or 4 bills paid on that day. Looking at the answers, A fits that answer. Also, 1 and 5 are interchangeable; and answer A only has 5 in it. Wouldn’t that mean that A is the best choice?
I think you are misunderstanding the question. When a question asks for a “complete and accurate list”, they’re not asking for which bills could be paid together, they’re asking which ones could possibly be paid for on Wednesday. Our main diagrams show that both 1 and 5 could be paid on Wednesday, so they need to be included for the answer to be correct.
You can also think of these questions as asking for an “exhaustive list”. Answer choice A doesn’t give an exhaustive list.