3. The median value of following data is 55.25. Find the missing frequencies if total of frequencies is 100
Class. frequency
10-20 5
20-30. 6
30-40. 9.
40-50. ?
50-60. 22
60-70. 18
70-80. ?
80-90. 9
Answers
Answered by
1
Answer:
class f cf
0-10 10 10
10-20 x 10+x
20-30 25 35+x
30-40 30 65+x
40-50 y 65+x+y
50-60 10 75+x+y
75+x+y
75+x+y=100
x+y=25
f=30,h=10,cf=35+x,
2
n
=50
Median=l+(
f
2
n
−cf
)×h
32=(
30
50−35−x
)×10
32−30=
3
15−x
6=15−x
x=9
∴y=16
Was this answer helpful?
Similar questions