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The average temperature of the first thr...

The average temperature of the first three days is `27^@C` and that of the next three is `29^@C` if the average of the whole week is`28.5^@C`

A

`10.5^@C`

B

`21^@C`

C

`31.5^@`

D

none of these

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The correct Answer is:
C
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