PrepTest 69, Section 1, Question 9
Exactly six petri dishes�labeled dish 1 through dish 6�are to be stored in an otherwise empty refrigerator. There are three available shelves�the bottom shelf, the middle shelf, and the top shelf. The placement of the dishes must be consistent with the following conditions:
Exactly six petri dishes�labeled dish 1 through dish 6�are to be stored in an otherwise empty refrigerator. There are three available shelves�the bottom shelf, the middle shelf, and the top shelf. The placement of the dishes must be consistent with the following conditions:
Exactly six petri dishes�labeled dish 1 through dish 6�are to be stored in an otherwise empty refrigerator. There are three available shelves�the bottom shelf, the middle shelf, and the top shelf. The placement of the dishes must be consistent with the following conditions:
Exactly six petri dishes�labeled dish 1 through dish 6�are to be stored in an otherwise empty refrigerator. There are three available shelves�the bottom shelf, the middle shelf, and the top shelf. The placement of the dishes must be consistent with the following conditions:
No more than three dishes are stored on any shelf.
Dish 2 is stored at least one shelf above dish 6.
Dish 6 is stored either one shelf above or one shelf below dish 5.
Dish 1 is not stored on the same shelf as dish 4.
If exactly one of the shelves has no dish stored on it, which one of the following must be true?
Exactly three of the dishes are stored on the bottom shelf.
Exactly three of the dishes are stored on the middle shelf.
Dish 1 is stored on the same shelf as dish 5.
Dish 2 is stored on the same shelf as dish 3.
Dish 4 is stored on the same shelf as dish 5.
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