A donut shop sells exactly seven different types of donuts: 1, 2, 3, 4, 5, 6, and 7. Choose five different types of donuts to buy using the following guidelines:
If type 2 is chosen, type 3 cannot be chosen.
If type 3 is chosen, type 6 must be chosen.
If type 7 is chosen, type 4 must be chosen.
Which of the following combinations of donuts corresponds with the directions?

Question

Quizplus · Accepted Answer

Two of the guidelines apply to this answer choice: If type 2 is chosen, type 3 cannot be chosen and If type 7 is chosen, type 4 must be chosen.  This answer choice follows both of those guidelines.
1, 3, 4, 5, 7 is incorrect. This answer choice breaks the second guideline: If type 3 is chosen, type 6 must be chosen. 
1, 2, 3, 5, 6 is incorrect. This answer choice breaks the first guideline: If type 2 is chosen, type 3 cannot be chosen.
1, 2, 5, 6, 7 is incorrect. This answer choice breaks the third guideline: If type 7 is chosen, type 4 must be chosen.

A Donut Shop Sells Exactly Seven Different Types of Donuts