Question

The average temperature on Monday,Tuesday and Wednesday was 40 C.The average temperature of Tuesday, Wednesday and Thursday was 41C.If the temperatureon Thursday was 42 C,what was the temperatureon Monday?

Answer 1

Average temperature for Wednesday, Thursday and Friday = 40oC
Total temperature = 3*40 = 120oC
Average temperature for Thursday, Friday and Saturday = 41oC
Total temperature = 41*3 = 123oC
Temperature on Saturday = 42oC
Now,
(Thursday + Friday + Saturday) - (Wednesday + Thursday + Friday) = 123-120;
Saturday - Wednesday = 3
Wednesday = 42-3 = 39oC.

Answer 2

Answer:

Temperature on Monday = 39°C

Step-by-step explanation:

Average temperature on Tuesday,Wednesday and Thursday = 41°C

Temperature on Thursday = 42°C

We know that average

= adding a group of numbers

______________________

count of those numbers

Let the temperature on Tuesday and Wednesday be = x

x+x+42

———— = 41

3

2x+42 = 41×3

2x = 123-42

x = 81

___

2

x = 40.5°C

Therefore, temperature on Tuesday and Wednesday = 40.5°C

Let the temperature on Monday be = y

40.5+40.5+y

——————— = 40°C

3

81+y = 40×3

y = 120-81

y= 39°C

Therefore, the temperature on Monday is = 39°C

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