Question

Find the number of workers with wages i) less than Rs 500 ii) at least Rs 400

Salary in Rs

200-300

300-400

400-500

500-600

No of workers

15

25

30

12​

Answer 1

Answer:

Daily Wages

Frequency f

i

cf

0−100

40

40

100−200

32

72

200−300

48

120

300−400

22

142

400−500

8

150

∑f

i

=150

Where cf= cumulative frequency

Here

N=150

2

N

=75

cf just greater than 75 to 120

Median class 200−300

So, I=200, h=100, f=48 and

cf=cf of preceding class i.e 72

Substitute all the value in the above formula, we get

Median =200+{100×

48

(75−72)

}

=200+6.25

=206.25

Median of daily wages is Rs. 206.25

Step-by-step explanation:

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