## Introduction to Data Interpretation

#### Data Interpretation

Direction: The following bar chart represents the number of first year B. Com. students of St Xavier’s College using different companies’ smartphones. Study bar chart and answer the questions.

1. What percentage of girls are using the smartphones of Nokia?

1. According to given bar graph , we have
Number of Girls who use smart phones = 180 + 60 + 120 + 20 = 380
Number of Girls who use smart phones of Nokia = 120

 ∴ Required percentage = Number of Girls who use smart phones of Nokia × 100 Number of Girls who use smart phones

##### Correct Option: D

According to given bar graph , we have
Number of Girls who use smart phones = 180 + 60 + 120 + 20 = 380
Number of Girls who use smart phones of Nokia = 120

 ∴ Required percentage = Number of Girls who use smart phones of Nokia × 100 Number of Girls who use smart phones

 Required percentage = 120 × 100 = 31.58% 380

1. What percentage of boys are using the smartphones of Samsung?

1. As per the given bar diagram , we see
Number of Boys who use smart phones = 100 + 160 + 240 + 40 = 540
Number of Boys who use smartphones of Samsung = 100

 ∴ Required percentage = Number of Boys who use smartphones of Samsung × 100 Number of Boys who use smart phones

##### Correct Option: C

As per the given bar diagram , we see
Number of Boys who use smart phones = 100 + 160 + 240 + 40 = 540
Number of Boys who use smartphones of Samsung = 100

 ∴ Required percentage = Number of Boys who use smartphones of Samsung × 100 Number of Boys who use smart phones

 Required percentage = 100 × 100 = 18.52% 540

1. The ratio of the number of boys to the number of girls using the smartphones of Samsung and Sony together is

1. On the basis of given graph in question , we have
The number of boys using the smartphones of Samsung and Sony = 100 + 160 = 260
The number of girls using the smartphones of Samsung and Sony = 180 + 60 = 240
Required ratio = The number of boys using the smartphones of Samsung and Sony : The number of girls using the smartphones of Samsung and Sony

##### Correct Option: B

On the basis of given graph in question , we have
The number of boys using the smartphones of Samsung and Sony = 100 + 160 = 260
The number of girls using the smartphones of Samsung and Sony = 180 + 60 = 240
Required ratio = The number of boys using the smartphones of Samsung and Sony : The number of girls using the smartphones of Samsung and Sony
Required ratio = 260 : 240 = 13 : 12

Direction: Study the double bar graph given below and answer the questions.

1. The percentage of students of class VIII participating in cultural event out of total participants of cultural event is

1. According to given bar graph , we have
Total number of participants in cultural events = 180
Students of class VIII = 45

 Required percentage = 45 × 100 180

##### Correct Option: B

According to given bar graph , we have
Total number of participants in cultural events = 180
Students of class VIII = 45

 Required percentage = 45 × 100 = 25% 180

1. The ratio of the participants in exhibition of class IX with the total participants of class IX is

1. On the basis of given graph in question ,
Number of participants in exhibition of class IX = 75
Total participants of class IX = 75 + 30 = 105

##### Correct Option: A

On the basis of given graph in question ,
Number of participants in exhibition of class IX = 75
Total participants of class IX = 75 + 30 = 105
Required ratio = 75 : (75 + 30) = 75 : 105 = 5 : 7