# CBSE Class 10-Mathematics: Chapter – 14 Statistics Part 11 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 2:

Find the median of the following data:

 Marks Frequency Less than Less than Less than Less than Less than Less than Less than Less than

First of all, we shall change cumulating series into simple series.

We have

 X F C. F 0 - 10 0 0 10 - 30 10 10 30 - 50 15 25 50 - 70 18 43 70 - 90 22 65 90 - 110 22 87 110 - 130 9 96 130 - 150 4 100

Now ,

which lies in 70 - 90 class

Median class

Here,

We know that Median,

Question 3:

Find the median of the following data.

 Wages (in rupees) No. of workers More than 150 More than 140 More than 130 More than 120 More than 110 More than 100 More than 90 More than 80

First of all, we shall find simple frequencies.

 Wages (in Rupees) (X) No. of workers (F) C. F 80 - 90 9 9 90 - 100 17 26 100 - 110 19 45 110 - 120 45 90 120 - 130 33 123 130 - 140 15 138 140 - 150 2 150

Now which lies in class

Median class

Here,

We know that

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