The given graph shows rainfall in centimetres in the cities M, N, O and P from 2001 to 2005. Study the graph and answer the question.

Which city has the widest range of rainfall over 5 years?

Correct option is B

Solution:    

The following data represents the rainfall (in centimeters) for cities M, N, O, and P from 2001 to 2005:

M: 160, 140, 160, 160, 170

N: 160, 160, 170, 150, 190

O: 130, 120, 130, 120, 130

P: 100, 150, 120, 100, 180

To find the city with the maximum average rainfall, we calculate the average rainfall for each city as follows:

Range rainfall for   = 170 - 140 = 30 

Range rainfall for N = 150 - 190 = 40

Range rainfall for O   = 130 - 120 = 10 

Range rainfall for P = 180 - 100 = 80 

According to the calculating data City P has the widest range of rainfall over 5 years