What is the temperature of the last day

The average temperature of the first 3 days of a week is 26.50 C and that of the next 3 days is 29C. If the weekly average is  27.4C, What is the temperature of the last day:

  1. 26.80C
  2. 24.80C
  3. 25.30 C
  4. 25.20 C
Monis Rasool Professor Asked on 25th October 2015 in Maths.
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1 Answer(s)

Answer: (3) 25.3oC

Explanation:-
The average temperature of the first 3 days of a week = 26.5oC
Then, the total temperature of first 3 days of a week = 3 x 26.5
= 79.5oC

The average of next 3 days of the same week = 29oC
Then, the total temperature of the next three days = 29 x 3
= 87oC

The average temperature of the week = 27.4oC
Then, the total temperature of the week = 7 x 27.4
= 191.8oC

Then, the temperature of the last day = 191.8 – (87 + 79.5)
= 25.3oC

Hence, the answer is (3) 25.3oC.

Anurag Mishra Professor Answered on 25th October 2015.
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