Question

kamal kept a log of how many pages he read each month.
pages read
september
october
november
month
december
january
february
march
what is the mean of the numbers?

Explanation:

Step1: Identify the data values

From the bar - graph: September has 90 pages, October has 50 pages, November has 90 pages, December has 90 pages, January has 50 pages, February has 100 pages, March has 90 pages.

Step2: Calculate the sum of data values

Sum \(S=90 + 50+90 + 90+50 + 100+90\)
\(S=(90\times4)+(50\times2)+100\)
\(S = 360+100 + 100\)
\(S=560\)

Step3: Calculate the number of data points

Number of months \(n = 7\)

Step4: Calculate the mean

Mean \(\bar{x}=\frac{S}{n}\)
\(\bar{x}=\frac{560}{7}\)

Answer:

\(80\)