If the standards committee has a quorum, then the general assembly will begin at 6:00 P.M. today. If the awards commi...

R on July 18, 2018

Answer Explanation

Hi there, could you please explain why E is the correct answer here, thanks.

2 Replies

Mehran on July 20, 2018

@RJEh of course!

Let's diagram the stimulus first:

"If the standards committee has a quorum, then the general assembly will begin at 6:00 P.M. today."

SCQ ==> GAS@6pm
not GAS@6pm ==> not SCQ

"If the awards committee has a quorum, then the general assembly will begin at 7:00 P.M. today."

ACQ ==> GAS@7pm
not GAS@7pm ==> not ACQ

This is a Must Be True question so we are looking for the answer choice that is 100% supported by the information in the stimulus.

Now let's take a look at (E):

"If the standards committee has a quorum, then the awards committee does not have a quorum."

We know that if the standards committee has a quorum, then the general assembly will begin at 6:00 P.M. today.

SCQ ==> GAS@6pm

This will invoke the contrapositive of the second principle because if the general assembly will begin at 6:00 P.M. today that means it WILL NOT begin at 7:00 P.M., which means that the awards committee does not have a quorum.

SCQ ==> GAS@6pm = not GAS@7pm ==> not ACQ

Therefore (E) is 100% supported so (E) must be true and (E) would be the correct answer.

Hope that helps! Please let us know if you have any other questions.

Michelle on July 20, 2018

@rjeh

Let's start by mapping the stimulus and its contrapositives.

SCQ ==> GA6
not GA6 ==> not SCQ

ACQ ==> GA7
not GA7 ==> not ACQ

This question stem is asking us to identify which answer choice must be true.

Answer choice E states "If the standards committee has a quorum, then the awards committee does not have a quorum."

How do we know that this is true?

Well, we know that if the standards committee has a quorum, then the GA will begin at 6.

If the GA begins at 6, then it does not begin at 7.

We know from our contrapositive that not GA7 ==> not ACQ

Therefore SCQ ==> GA6 ==> not GA7 ==> not ACQ