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


We have

We need to show it into a proper table representing frequencies and cumulative frequencies.


So,



We have added up all the values of the frequency in the second column and have got,


Total = n = 62


Now, we just need to find the value of n/2. So,



⇒


Now, look up for a value in the cumulative frequency just greater than 31.


We have, 35.


Corresponding to this value of cumulative frequency, we can say that median class is 20 – 30.


That is,


Median class = 20 – 30


Thus, option (c) is correct.

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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:

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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



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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 ….