PrepTest 83, Section 1, Question 9
A music professor must set the order in which her students will give performances in a concert. Exactly five students will perform—Gloria, Hazel, Roberto, Sonja, and Toshiro. The students will perform one at a time, and each student will perform only once. The following conditions restrict the order in which the students perform:
A music professor must set the order in which her students will give performances in a concert. Exactly five students will perform—Gloria, Hazel, Roberto, Sonja, and Toshiro. The students will perform one at a time, and each student will perform only once. The following conditions restrict the order in which the students perform:
A music professor must set the order in which her students will give performances in a concert. Exactly five students will perform—Gloria, Hazel, Roberto, Sonja, and Toshiro. The students will perform one at a time, and each student will perform only once. The following conditions restrict the order in which the students perform:
A music professor must set the order in which her students will give performances in a concert. Exactly five students will perform—Gloria, Hazel, Roberto, Sonja, and Toshiro. The students will perform one at a time, and each student will perform only once. The following conditions restrict the order in which the students perform:
Hazel must perform earlier than Roberto.
If Gloria performs earlier than Toshiro, then Roberto and Sonja must also perform earlier than Toshiro.
Hazel must perform either earlier than both Sonja and Toshiro or else later than both of them.
Which one of the following pairs CANNOT be the second and third students to perform, respectively?
Gloria and Hazel
Hazel and Roberto
Roberto and Toshiro
Sonja and Gloria
Toshiro and Sonja
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