45
Find the value of missing frequencies if Q, = 36 and N = 840
X:
20-25
25-30
30-35
35-40
40-45
45-50
50-55
55-60
F:
40
50
?
150
180.
130
?
60
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Answer:
ANSWER
Wages
No. of persons(fi)
Cumulative Frequency (c.f.)
20-25
50
50
25-30
70
120
30-35
100
220
35-40
180
400
40-45
150
550
45-50
120
670
50-55
70
740
55-60
60
800=n
2n=400
median=l+fh×(2n−c)
l=35;h=5;f=180;c=220
median=35+1805×(400−220)
=40
or, l=40;h=5;f=150;c=400
=40+1505×(400−400)
=40
Therefore, in both the cases, median =40
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