1.

The average temperature of first three days of the week is 23° C; the average temperature of next three days is 24° C and the average temperature of whole week is 23.5° C. The temperature on the last day of the week is:

A. 24.5°C
B. 22.5°C
C. 23.5°C
D. 21.5°C
Answer» D. 21.5°C


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