The average temperature from Monday to Wednesday was 36°C and from Tuesday to Thursday was 34°C. Thursday's temperature was \(\frac{4}{5}\) of Monday's. What was Thursday's temperature?
A. 30°C
B. 28°C
C. 26°C
D. 24°C
A. 30°C
B. 28°C
C. 26°C
D. 24°C
Best answer
Answer: D. 24°C
Answer: (D) 24°C
Mon + Tue + Wed = 108 and Tue + Wed + Thu = 102, so Mon − Thu = 6.
Mon − 0.8 Mon = 6 gives Mon = 30°C, so Thu = 0.8 × 30 = 24°C. Trap: 30°C is Monday's temperature.
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