PrepTest 66, Section 1, Question 5
A chemistry class has six lab sessions scheduled over three days�Wednesday, Thursday, and Friday�one session being held each morning and one each afternoon. Each session will be led by a different lab assistant�Julio, Kevin, Lan, Nessa, Olivia, or Rebecca. The assignment of lab assistants to sessions is constrained as follows:
A chemistry class has six lab sessions scheduled over three days�Wednesday, Thursday, and Friday�one session being held each morning and one each afternoon. Each session will be led by a different lab assistant�Julio, Kevin, Lan, Nessa, Olivia, or Rebecca. The assignment of lab assistants to sessions is constrained as follows:
A chemistry class has six lab sessions scheduled over three days�Wednesday, Thursday, and Friday�one session being held each morning and one each afternoon. Each session will be led by a different lab assistant�Julio, Kevin, Lan, Nessa, Olivia, or Rebecca. The assignment of lab assistants to sessions is constrained as follows:
A chemistry class has six lab sessions scheduled over three days�Wednesday, Thursday, and Friday�one session being held each morning and one each afternoon. Each session will be led by a different lab assistant�Julio, Kevin, Lan, Nessa, Olivia, or Rebecca. The assignment of lab assistants to sessions is constrained as follows:
Kevin and Rebecca must lead sessions that meet on the same day.
Lan and Olivia cannot lead sessions that meet on the same day.
Nessa must lead an afternoon session.
Julio's session must meet on an earlier day of the week than Olivia's.
If Julio leads the Thursday afternoon session, then for how many of the other lab assistants can one determine which sessions they lead?
one
two
three
four
five
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