Monday, 28 April 2014

How to solve Bar Diagram Questions in Data Interpretation?

Directions (Q. 1 to 5): Study the following graph and answer the questions below it:

Number of students from various faculties studying in various colleges (Number in Thousands)





1. What is the ratio of the number of students from the faculty of Arts studying in college C to the number faculty of Arts studying in college D?

(a) 13:10
(b) 9:13
(c) 13:9
(d) 10:13
(e) None of these


Answer: Option (a) 13:10

Explanation:

Number of students from the faculty of Arts:

From college C = 32500

From college D = 25000

=> Required ratio = 32500:25000 = 13:10



2. What is the average number of students studying in college A from all the faculties together?

(a) 28500
(b) 26000
(c) 26500
(d) 27000
(e) None of these

Answer: Option (e) None of these

Explanation:

Required average = (25+27.5+30)/3 = 82.5/3 = 27.5 (thousand) = 27500 



3. What is the average number of students from the faculty of Arts from all the colleges together?

(a) 26250
(b) 27250
(c) 26500
(d) 27000
(e) None of these

Answer: Option (a) 26250

Explanation:

Required average no. of Arts students = (25+22.5+32.5+25)/4  = 105/4 (thousand) = 26250
                                     

                                      

4. The students from the faculty of Commerce studying in college B are approximately what percent of the total number of students in the same college?

(a) 35
(b) 30
(c) 48
(d) 43
(e) 53

Answer: Option (d) 43

Explanation:

Total no. of students in college B = (22.5+32.5+20) thousand = 75 thousand
                                   
Number of Commerce students in college B = 32.5 thousand

=> Required percentage = (32.5/75) x 100 = 43


5. What is the difference between the total number of students from the faculty of Commerce from all the colleges together and the total number of students from the faculty of Science from all the colleges together?

(a) 25000
(b) 20000
(c) 10000
(d) 15000
(e) None of these

Answer: Option (d) 15000

Explanation:

Total number of Commerce students = (27.5+32.5+25+22.5) thousand = 107.5 thousand
                                  
Total number of Science students  = (30+20+12.5+30) thousand   = 92.5 thousand
                                
=> Required difference = (107.5 - 92.5) thousand  = 15 thousand



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