Q10 of 43 Page 293

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

The cumulative frequency of class 20-30 of the frequency distribution given in (9) is ….


We have

Cumulative frequency of a class is just the sum of frequencies of the particular class along with all the classes preceding the class.


So, Cumulative frequency of class 20 – 30 = Sum of frequency of the class 20 – 30 along with frequencies of all the classes preceding the class 20 – 30.


⇒ Cumulative frequency of class 20 – 30 = 7 + 15 + 13


⇒ Cumulative frequency of class 20 – 30 = 35


Thus, option (b) is correct.

More from this chapter

All 43 →
10

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

(7) If = 21.44 and Z = 19.13, then M =


 10

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

If M = 26, =36, then Z =


 10

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

(9) The modal class of the frequency distribution given below is



 10

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

The median class of the frequency distribution given in (9) is ….