Organise the following marks in a class assessment, in a tabular form. 4, 6, 7, 5, 3, 5, 4, 5, 2, 6, 2, 5, 1, 9, 6, 5, 8, 4, 6, 7
(i) Which number is the highest? (ii) Which number is the lowest?
(iii) What is the range of the data? (iv) Find the arithmetic mean
Solution:
As per the question, we use the basic definition of parameters of statistics like mean and range to solve the problem.
The given data is as follows,
4, 6, 7, 5, 3, 5, 4, 5, 2, 6, 2, 5, 1, 9, 6, 5, 8, 4, 6, 7
Let's tabulate the data as shown below.
(i)The highest number is 9.
(ii)The lowest number is 1.
(iii) We know that, Range = Highest marks – Lowest marks
The range of the data = Highest number – Lowest number
= 9 - 1
= 8
(iv) Arithmetic mean = Sum of all the marks / Total number of observations
= (4 + 6 + 7 + 5 + 3 + 5 + 4 + 5 + 2 + 6 + 2 + 5 + 1 + 9 + 6 + 5 + 8 + 4 + 6 + 7) / 20
= 100 / 20
= 5
☛ Check: NCERT Solutions for Class 7 Maths Chapter 3
Video Solution:
Organise the following marks in a class assessment, in a tabular form. 4, 6, 7, 5, 3, 5, 4, 5, 2, 6, 2, 5, 1, 9, 6, 5, 8, 4, 6, 7 (i) Which number is the highest? (ii) Which number is the lowest? (iii) What is the range of the data? (iv) Find the arithmetic mean
NCERT Solutions Class 7 Maths Chapter 3 Exercise 3.1 Question 2
Summary:
The following marks in a class assessment, 4, 6, 7, 5, 3, 5, 4, 5, 2, 6, 2, 5, 1, 9, 6, 5, 8, 4, 6, 7 has been arranged in a tabular format. (i)The highest number is 9, (ii)The lowest number is 1. (iii) The range of the data is 8. (iv) Arithmetic mean of the data is given as 5.
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