Averages, weighted average, simple arithmetic mean problems : CAT MBA Entrance classes, Study Material

Question 4 the day : November 12, 2003
The question for the day is a question in Simple Average, Arithmetic Mean - an Arithmetic Topic and the problem provides an understanding of the different concepts related to Averages.

Question
The average temperature on Wednesday, Thursday and Friday was 25⁰. The average temperature on Thursday, Friday and Saturday was 24⁰. If the temperature on Saturday was 27⁰, what was the temperature on Wednesday?

1. 24⁰
2. 21⁰
3. 27⁰
4. 30⁰

Correct Answer is 30⁰. Correct Choice is (4)

Explanatory Answer

Total temperature on Wednesday, Thursday and Friday was 25 * 3 = 75⁰

Total temperature on Thursday, Friday and Saturday was 24 * 3 = 72⁰

Hence, difference between the temperature on Wednesday and Saturday = 3⁰

If Saturday temperature = 27⁰, then Wednesday's temperature = 27 + 3 = 30⁰

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