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In the class intervales 10-20, 20-30, th...

In the class intervales `10-20`, `20-30`, the number is `20` is included in

A

44489

B

20-30

C

10-20 and 20-30

D

None of these

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The correct Answer is:
B
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(i)Find the class mark of the class 90-120. (ii)In a frequency distribution, the mid-value of the class is 10 and width of the class is 6. Find the lowe limit of the class. (iii)The width of each of the five continuous classes in a frequency distribution is 5 and lowe class limit of the lowest class is 10. What is the upper class limit of the highest class? (iv) The class marks of a frequency distribution are 15,20,25...... Find the class corresponding to the class mark 20. (v)In the class intervals 10-20, 20-30, find the class in which 20 is included.

In the class interval 20 - 30, the lower class limit is _______

In the class intervals 10-20, 20-30, 20 is taken in the interval 10-20 (b) the interval 20-30 both intervals 10-20, 20-30 (d) none of the intervals

The median of 100 observations grouped in classes of equal width is 25. If the median class interval is 20-30 and the number of observations less than 20 is 45, then the frequency of median class is

If the classes are 0 -10 , 10-20, 20-30…., then in which class should the observation 10 be included ?

Find the class mark of the class 10 -20.

The average age of all the students of a class is 18 years. The average age of boys of the class is 20 years and that of the girls is 15 years. If the number of girls in the class is 20, then find the number of boys in the class. (a) 15 (b) 30 (c) 45 (d) 50

The class are 10-20,20-30,30-40,….. What is the class interval of each class?

In a frequency distribution with classes 0-10, 10-20 etc., the size of the class intervals is 10. The lower limit of fourth class is

If the median of the distribution given below is 28.5, find the value of x and y . Class interval: 0-10 10-20 20-30 30-40 40-50 50-60 No. of students: 5 x 20 15 y 5

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