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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? 

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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?
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APPEARS IN

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