Question

# The average temperature of the first three days of a week is 27$$^o$$C and the next three days is 29$$^o$$C. If the weekly average is 28.5$$^o$$C. What is the temperature on the last day?

A
31.5oC
B
28oC
C
21oC
D
42oC

Solution

## The correct option is A 31.5$$^o$$CMean temperature would be given by:$$\dfrac{27 \times 3 +29 \times 3+ {Temperature of Last Day} }{7}= 28.5$$$$\therefore 28.5 \times 7 - 27 \times 3 - 29 \times 3 = 31.5^o C$$Mathematics

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