A thermometer measures temperature in whole degrees only. If the temperature falls below 18 degrees, the heating is switched off. It is switched on again when the temperature reaches 21 degrees. What are the best values in degrees to cover all equivalence partitions?
A. 15, 19 and 25.
B. 17, 18, and 19.
C. 18, 20 and 22.
D. 16, 26, and 32.
Answer:A
A thermometer measures temperature in whole degrees only. If the temperature falls below 18 degrees, the heating is switched off. It is switched on again when the temperature reaches 21 degrees. What are the best values in degrees to cover all equivalence partitions?
A. 15, 19 and 25. B. 17, 18, and 19. C. 18, 20 and 22. D. 16, 26, and 32.