The following is the distribution of weights (in kg) of 52 persons : Weight in kg Persons 30-40 40-50 50-60 60-70 70-80 10 15 17 6 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?

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

Weight in kg

Persons

30-40

40-50

50-60

60-70

70-80

10

15

17

6

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?

(i) lower limit = 50.

(ii) Class marks of class 40 – 50 =

Class marks of class 50 – 60 =

(iii) Class size = 40 – 30 = 10, or 60 – 50 = 10.

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