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The mean daily rainfall for a week was 5.5mm.for the first six days the mean rainfall was 1mm.How much rainfall on the seventh day ​

User ColBeseder
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1 Answer

1 vote

Answer:

There was 32.5mm of rainfall on the seventh day.

Explanation:

Mean of a data-set:

The mean of a data-set is the sum of all values of a data-set divided by the number of values in the data-set.

The mean daily rainfall for a week was 5.5mm.for the first six days the mean rainfall was 1mm.

This means that during the week(7 days), the total amount of rain was of:


6*1 + x = 6 + x

How much rainfall on the seventh day ​?

This is x. We have that:


(6 + x)/(7) = 5.5


6 + x = 7*5.5


6 + x = 38.5


x = 38.5 - 6 = 32.5

There was 32.5mm of rainfall on the seventh day.

User Shakespeare
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