# The Following is the Distribution of Weights (In Kg) of 52 Persons: - Mathematics

The following is the distribution of weights (in kg) of 52 persons:

 Weight in kg Persons 30-40 10 40-50 15 50-60 17 60-70 6 70-80 4

(i) What is the lower limit of class 50-60?
(ii) Find the class marks of the classes 40-50, 50-60.
(iii) What is the class size?

#### Solution

(i) The lower limit of the class 50$-$60 is 50.

(ii) Class mark for the class 40$-$50:

$\frac{40 + 50}{2}$
$= \frac{90}{2}$
$= 45$

Again, class mark for the class 50 $-$ 60:

$\frac{50 + 60}{2}$
$= \frac{110}{2}$
$= 55$
(iii) Here the class size is  40$-$ 30, i.e. 10.
Is there an error in this question or solution?

#### APPEARS IN

RD Sharma Class 8 Maths
Chapter 23 Data Handling-I (Classification and Tabulation of Data)
Exercise 23.2 | Q 3 | Page 14