Average temperature of a week is 30°C. If the average of first 4 days was 31°C, then average temperature of the remaining days will be:
A. 29.33°C
B. 29°C
C. 25.5°C
D. 28.67°C
Answer: Option D
Solution(By Examveda Team)
Total temperature of the week = 30°C × 7 = 210°CTotal temperature first four day = 31°C × 4 = 124°C
Average temperature of remaining day
$$\eqalign{ & = \frac{{{{210}^ \circ }{\text{C}} - {{124}^ \circ }{\text{C}}}}{3} \cr & = \frac{{{{86}^ \circ }{\text{C}}}}{3} \cr & = {28.67^ \circ }{\text{C}} \cr} $$
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