"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.