Verified Answer :

C20. When you add them all up and divide by seven, you get 20

Answer:

Option c - 20          

Step-by-step explanation:

Given : The set of data

18, 15, 22, 18, 25, 19, 23

To find: The mean of the data?

Solution :

Mean is defined as the sum of the number of observation by total number of observation.

\(M=\frac{\sum x_n}{n}\)

\(M=\frac{18+15+22+18+25+19+23}{7}\)

\(M=\frac{140}{7}\)

\(M=20\)

Therefore, The mean of the data is 20.

So, Option c is correct.

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