Chapter 17 Measures of Central Tendency Ex 17.3

Rajasthan Board RBSE Class 10 Maths Chapter 17 Measures of Central Tendency Ex 17.3

Find the mean (arithmetic) of following frequency distribution (Q. 1 – 4)
Question 1.

Solution :
Calculation of arithmetic mean

Arithmetic mean =  = 26.33(approx)

Question 2.

Solution :
Calculation of arithmetic mean

Arithmetic mean =  = 15.45

Question 3.

Solution:
Calculation of arithmetic mean :

Arithmetic mean =  = 145.71
Thus, required arithmetic mean = 145.71

Question 4.

Solution:
Calculation of arithmetic mean :

Arithmetic mean =  = 49.5
Thus, required arithmetic mean = 49.5

Question 5.
Find mean of the following frequency distribution :

Solution:

Arithmetic mean =  = 68.2
Thus, frequency distribution mean = 68.2

Question 6.
The salary of employees in a factory are according to following table :

Find the arithmetic mean of salary.
Solution :
Calculation of arithmetic mean :

Arithmetic mean =  = 1457.14
Thus, arithmetic mean of salary = ₹ 1457.14