From the following items: 1) Red, 2) Blue, 3) Green, 4) Yellow, the selection criteria are: 1) Red and Blue cannot be selected together. 2) Green must be selected if Yellow is selected. Which of the following combinations is valid?
A committee of three members is to be formed from the following individuals: A, B, C, D, and E. The selection rules are: 1) A and B cannot be on the committee together. 2) C must be included if D is included. Which of the following committees is valid?
In a selection of fruits: Apple, Banana, Cherry, and Date, the following conditions apply: 1) Apple and Banana cannot be selected together. 2) Cherry must be selected if Date is selected. Which of the following selections is valid?
In a set of items: Red, Blue, Green, and Yellow, the following conditions apply: Red cannot be selected with Blue. Green can only be selected if Yellow is also selected. Which items can be selected together?
A, B, C, D, and E are five students who scored the following marks: A scored more than B but less than C. D scored less than E but more than A. Who scored the least?