In a class of students: Alex, Ben, Clara, and Dana, the following conditions hold: Alex scored higher than Ben but lower than Clara. Dana scored the lowest. Who scored the highest?
In a group of five friends: Alice, Bob, Charlie, David, and Eva, the following conditions apply: 1) Alice and Bob cannot be selected together. 2) Charlie must be selected if David is selected. 3) Eva can only be selected if Alice is also selected. Which of the following groups can be selected?
A committee of four members is to be formed from the following individuals: John, Sarah, Mike, Lisa, and Tom. The selection criteria are: 1) John and Sarah cannot be on the committee together. 2) If Mike is selected, Lisa cannot be selected. 3) Tom must be included if Lisa is included. Which of the following combinations meets these criteria?
From the following items: A, B, C, D, and E, the selection criteria are: 1) A and B cannot be selected together. 2) C must be selected if D is selected. 3) E can only be selected if A is selected. Which of the following selections is valid?
A team of three is to be formed from the following people: Alex, Brian, Clara, and Diana. The selection rules are: 1) Alex and Brian cannot be selected together. 2) Clara must be included if Diana is included. Which of the following teams is valid?