## Introduction to Data Interpretation

#### Data Interpretation

Direction: Study the following histogram of data related to literate people of different age groups and answer the questions given below. 1. Total number of literate people in the age group 15 to 45 years is

1. As per the given above graph , we can see
Number of literate people in the age interval 15-20 = 900
Number of literate people in the age interval 20-25 = 800
Number of literate people in the age interval 25-30 = 650
Number of literate people in the age interval 30-35 = 600
Number of literate people in the age interval 35-40 = 500

##### Correct Option: B

As per the given above graph , we can see
Number of literate people in the age interval 15-20 = 900
Number of literate people in the age interval 20-25 = 800
Number of literate people in the age interval 25-30 = 650
Number of literate people in the age interval 30-35 = 600
Number of literate people in the age interval 35-40 = 500
Number of literate people in the age interval 40-45 = 250
Total number of literate people in the age group 15 to 45 years = 900 + 800 + 650 + 600 + 500 + 250 = 3700

Direction: Study the following histogram of marks in mathematics (out of 50) of students in a class and answer the following questions. 1. If the students have got the marks out of 50 and if A+ grade has been declared for above 90%, then the number of students who have got A+ grade is :

1. On the basis of given graph in question ,
Number of students who score more than 90% = class – interval 45 – 50 = 10

##### Correct Option: A

On the basis of given graph in question ,
Number of students who score more than 90% = class – interval 45 – 50 = 10
Therefore , correct answer is option A.

1. The percentage of number of passed students is (31 is the pass marks)

1. From the given above histogram , we can see
Total students ⇒ 135
Successful students ⇒ 20 + 40 + 50 + 10 = 120

 ∴ Required percent = 120 × 100 35

##### Correct Option: D

From the given above histogram , we can see
Total students ⇒ 135
Successful students ⇒ 20 + 40 + 50 + 10 = 120

 ∴ Required percent = 120 × 100 35

 Required percent = 800 = 88 8 % 9 9

1. The total number of students in the class is :

1. From the given above histogram , we have
Number of students in the class interval 25-30 = 15
Number of students in the class interval 30-35 = 20
Number of students in the class interval 35-40 = 40
Number of students in the class interval 40-45 = 50
Number of students in the class interval 45-50 = 10

##### Correct Option: D

From the given above histogram , we have
Number of students in the class interval 25-30 = 15
Number of students in the class interval 30-35 = 20
Number of students in the class interval 35-40 = 40
Number of students in the class interval 40-45 = 50
Number of students in the class interval 45-50 = 10
Total students in the class ⇒ 15 + 20 + 40 + 50 + 10 = 135

1. If the pass marks in maths is 31, the number of students who failed in maths is :

1. As per the given question , we can say that If the pass marks in maths is 31, the number of students who failed in maths class-interval 25–30 = 15

##### Correct Option: B

As per the given question , we can say that If the pass marks in maths is 31, the number of students who failed in maths class-interval 25–30 = 15
Therefore , required answer is 15 .