PrepTest 57, Section 1, Question 17
Each of seven toy dinosaurs�an iguanadon, a lambeosaur, a plateosaur, a stegosaur, a tyrannosaur, an ultrasaur, and a velociraptor�is completely colored either green, mauve, red, or yellow. A display is to consist entirely of exactly five of these toys. The display must meet the following specifications:
Each of seven toy dinosaurs�an iguanadon, a lambeosaur, a plateosaur, a stegosaur, a tyrannosaur, an ultrasaur, and a velociraptor�is completely colored either green, mauve, red, or yellow. A display is to consist entirely of exactly five of these toys. The display must meet the following specifications:
Each of seven toy dinosaurs�an iguanadon, a lambeosaur, a plateosaur, a stegosaur, a tyrannosaur, an ultrasaur, and a velociraptor�is completely colored either green, mauve, red, or yellow. A display is to consist entirely of exactly five of these toys. The display must meet the following specifications:
Each of seven toy dinosaurs�an iguanadon, a lambeosaur, a plateosaur, a stegosaur, a tyrannosaur, an ultrasaur, and a velociraptor�is completely colored either green, mauve, red, or yellow. A display is to consist entirely of exactly five of these toys. The display must meet the following specifications:
Exactly two mauve toys are included.
The stegosaur is red and is included.
The iguanadon is included only if it is green.
The plateosaur is included only if it is yellow.
The velociraptor is included only if the ultrasaur is not.
If both the lambeosaur and the ultrasaur are included, at least one of them is not mauve.
If the display includes two green toys, then which one of the following could be true?
There is exactly one yellow toy included in the display.
The tyrannosaur is included in the display and it is green.
Neither the lambeosaur nor the velociraptor is included in the display.
Neither the tyrannosaur nor the velociraptor is included in the display.
Neither the ultrasaur nor the velociraptor is included in the display.
Explanations
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