Q4 of 10 Page 60

The number of drivers finded for breaking traffic rules on each day in June at a certain square is as follows –


From this data, make a frequency table and find the mean.

Let's make a frequency table for above data



We know that,


Mean,


Where, N is the sum of total frequencies


From above data,



Hence, mean is 2.


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6

The blood groups of the persons who had donated blood at blood donation camp are as follows.


Use this information to complete the table below.



(1) Which blood group has the smallest number of donors?


(2) Which blood group has the most donors?


(3) How many donors are of the ‘B’ blood group?


(4) What was the total number of donors at the camp?

 1

The frequency table of the ages of 40 students in a class is given below. Find their mean age.

 2

The record of daily rainfall (in centimetres) in Walwa village in the first 15 days of September is given below.

2.5, 1.5, 4.0, 3.0, 0.5, 5.0, 5.5, 4.0, 2.5, 3.5, 6.0, 0.5, 0.5, 4.5, 1.5.


Find the mean rainfall for these 15 days.

 3

The money earned (in rupees) by each of the 40 scouts in the Khari Kamai project is given below.


Make a frequency table for this data and find the mean.