Question

Find the missing frequencies x and y in the following frequency distribution table, 11 n100 and
median is 32.
0 - 10
Marks
No. of
students
10 – 2020 – 30
T 25
30 – 40
30
40 – 50
Y
50 – 60
10
Total
100
10
T​

Answer 1

Step-by-step explanation:

CF will be

10,10+X,35+X,65+X,65+X+y,75+X+y

x+y=100-75=25

Median=32

Median class=30-40

l=30

n/2=50

CF=35+X

F=30

h=10

Median=l+(n/2-CF)÷f×h

32=30+(50-35-x)÷30×10

2=(15-x)×1/3

x=9

y=16

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