#11 - Global

[Administrator]

Complete Question Explanation

The correct answer choice is (D).

Answer choice (A):

Answer choice (B):

Answer choice (C):

Answer choice (D): This is the correct answer choice.

Answer choice (E):

This explanation is still in progress. Please post any questions below!

[christinecwt]

Hi Team - why Answer Choice B is wrong given that Answer Choice D is correct and it covers two of the days mentioned in Answer Choice B? Thanks!

[katehos]

Hi christinecwt!

Answer choice (B) is incorrect because performing in Jazz on May 2, 4, and 5 creates a scenario that does not violate the rules, while placing Jazz on May 2 and 5 creates a scenario that does violate the rules. Since the question stem asks us to find out which schedule of Jazz Noguchi CANNOT perform in, the correct answer will be a placement of Jazz that violates the rules of the game.

Let's start with the scenario described in answer choice (B). If we place Jazz (J) on May 2, 4, and 5 only, we get a diagram that looks like this: _ J _ J J _. We can quickly place Orchestra (O) in spots 1 and 3 - which preserves the first rule - and place Solo (S) in spot 6. This gives us a valid scenario that ends up looking like: O J O J J S. So, we can eliminate (B)!

Moving on to answer choice (D), if we place J on May 2 and 5 only, then we get a diagram that looks like this: _ J _ _ J _. Now, if we try to place O in spots 1 and 3 - per the second rule - we get O J O _ J _. We can already see that this is an issue! We have an O without a J immediately following it, which violates the first rule. If we try putting O in spots 4 and 6, we run into the same issue (O cannot go in spot 6 since J must immediately follow O whenever O performs; the diagram would look like this before we cross it out _ J _ O J O). Since this is not a viable scenario, we know (D) is the correct answer, since Noguchi cannot perform Jazz on days 2 and 5 only!

I hope this helps
Kate

[John1965]

Hi everyone,

I don’t understand Global question #11. Can anyone explain why A is incorrect?

Thanks,

John

[Adam Tyson]

Sure thing, John! First, the question is asking for a negative - which of these answers CANNOT be true? That means the 4 wrong answers are all describing situations that COULD be true. They are all possible.

Next, notice that the answer choices all include the word "only"? Now imagine a scenario like answer A describes, where J is in slots 1, 3, and 4 only - there are no other Js in the solution. Could that work? Let's see:

We need at least one O somewhere, and it has to be right before a J. We can satisfy that by putting one O in slot 2. But we cannot add any more Os to the solution, because there is no other place to put an O right before a J.

Now if J is only in those three spaces, then spots 5 and 6 cannot be Js, so they would have to both have an S in them. That would give us this solution:

JOJJSS

Let's run that through the rules to see if it works:

1. Every O has a J right after it. Check!
2. Slots 1 and 3 are the same. Check!
3. There's never an S with an O right after it. Check!

Oh, and let's not forget the rule built into the scenario, that we have to use all three types. Check!

All of this proves that answer A COULD be true, and therefore it's a wrong answer because we want to select the one answer that CANNOT be true!