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3. The following table shows the daily wages of workers in a factory:
Daily wages (in 3) 0-100 100-200 200-300 300-400 400-500
Number of workers 40
32
48
22
8
Find the median daily wage income of the workers.
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Answer:
cf(cumulative frequency)=72+70+8/2=75
200-300 will be the median because 40+32+48=120
greater than 75
median=l+n/2-cf/f×h
l=200
n/2=75
cf=40+32=72
f=48
h=100
200+75-72/48×100
200+1/16×100
200+6.25
206.25
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