shaalaa.com
S

Solution - Mean of Grouped Data

Account
User


Login
Register


      Forgot password?
Share
Notifications

View all notifications
Books Shortlist
Your shortlist is empty

Question

In a retail market, fruit vendors were selling mangoes kept in packing boxes. These boxes contained varying number of mangoes. The following was the distribution of mangoes according to the number of boxes.

Number of mangoe50 − 5253 − 5556 − 5859 − 6162 − 64
Number of boxes1511013511525

Find the mean number of mangoes kept in a packing box. Which method of finding the mean did you choose?

Solution

You need to to view the solution
Is there an error in this question or solution?

Similar questions VIEW ALL

The measurements (in mm) of the diameters of the head of the screws are given below:

Diameter (in mm)No. of Screws
33 — 3510
36 — 3819
39 — 4123
42 — 4421
45 — 4727

Calculate mean diameter of head of a screw by ‘Assumed Mean Method’.

view solution

Consider the following distribution of daily wages of 50 worker of a factory.

Daily wages (in Rs)

100­ − 120

120­ − 140

140 −1 60

160 − 180

180 − 200

Number of workers

12

14

8

6

10

Find the mean daily wages of the workers of the factory by using an appropriate method.

view solution

The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate

Literacy rate (in %) 45 − 55 55 − 65 65 − 75 75 − 85 85 − 95
Number of cities 3 10 11 8 3

 

view solution

The following distribution shows the daily pocket allowance of children of a locality. The mean pocket allowance is Rs.18. Find the missing frequency f.

Daily pocket allowance (in Rs11­ − 1313­ − 1515 −1717 − 1919 − 2121 − 2323 − 25
Number of workers76913f54
view solution

To find out the concentration of SO2 in the air (in parts per million, i.e., ppm), the data was collected for 30 localities in a certain city and is presented below:

concentration of SO2 (in ppm)Frequency
0.00 − 0.044
0.04 − 0.089
0.08 − 0.129
0.12 − 0.162
0.16 − 0.204
0.20 − 0.242

Find the mean concentration of SO2 in the air.

view solution

Content BooksVIEW ALL [1]

Reference Material

Solution for concept: Mean of Grouped Data. For the course 8th-10th CBSE
S