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Monuj Konwar

· started a discussion

· 1 Months ago

h (Question: 89988.0 )

how come(+1)*3

Question:
The average temperature on Tuesday, Wednesday and Thursday was 37°C. The average temperature on Wednesday, Thursday and Friday was 38°C. If the temperature on Friday was 39°C, find the temperature on Tuesday.
Options:
A) 36oC
B) 32oC
C) 38oC
D) 42oC
E) None of these
Solution:

                                              Average Temperature

Tue + Wed + Thurs                              37°C

Fri + Wed + Thurs                                38°C


It is same.

Here, Tuesday is replaced by Friday. 

⇒ 39 - Temperature of Tuesday = +3

⇒ Temperature of Tuesday = 39 - 3 = 36°C.

kanhaiya jha

· commented

· 1 Months ago

Sum of observations = (average)*number of observations

Average Temperature
Tue + Wed + Thurs 37°C
Fri + Wed + Thurs 38°C

It is same.
Here, Tuesday is replaced by Friday.
∴ Temperature of Friday - Temperature of Tuesday = (+) 1 × 3
⇒ 39 - Temperature of Tuesday = +3
⇒ Temperature of Tuesday = 39 - 3 = 36°C.
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