# DILR Concept 7: Bar Graphs

Hello students! Welcome to DILR Concept 7

Concept name:– Bar Graphs

Concept explanationBar Graphs visually represent data in the form of bars representing data on y-axis with the title on x-axis. One needs to interpret the data and answer questions accordingly

Sample set: Read the information given below and answer the questions that follows: Q1)  If the stability of the production during 1990 to 1995 is defined as

Stability = (Average Production)/ (Max Production- Min Production)  , then which product is most stable?

Q2)  Individual revenue of P, Q, R and S for the entire period (1990 – 1995) is calculated based on the price of Rs. 9, Rs. 4, Rs. 13, and Rs. 3, respectively. Which product fetches the lowest revenue?

(a)     Product P     (b)  Product Q                    (c)  Product R                  (d)  Product S          (e)  Cannot be determined

Solution

We first make a table of Production of P,Q,R and S year wise

 P Q R S Total 1990 45 99 75 115 334 1991 25 41 93 158 317 1992 40 108 107 166 421 1993 38 60 63 139 300 1994 76 41 132 88 337 1995 56 70 120 97 343 Total 280 419 590 763 2052

Now stability of P= (280/6)/(76-25) =0.92

Similarly stability for Q,R and S are 1.04,1.43, and 1.63 respectively.

Hence , product S is most stable

Now for calculating revenues, we multiply number of product of each category with their price.

For P=> Revenues= 280*9=Rs 2520

Similarly for Q,R and S, Revenues are Rs 1676. Rs 7670 and Rs 2289.

So Product Q fetches the lowest revenue.

Level of difficulty: Easy

Hope you understood solving questions on Bar graphs

Happy learning!

Rahul Sir

CAT Coach

Quora profile: https://www.quora.com/profile/Rahul-Anand-51