Question

Q3.From the following distribution of 50 students, find the missing frequencies:
Given mode:36
0-10
10-20
20-30
30-40
40-50
50-60
Class
intervals
frequencie
5
7
f1
f2
10
6
S​

Answer 1

ANSWER

⇒  Modal class =30−40

So, f0=x,f1=16,f2=12,l=30 and h=10

⇒  Mode=l+2f1−f0−f2f1−f0×h

⇒  36=30+2×16−x−1216−x×10

⇒  6=20−x16−x×10

⇒  120−6x=160−10x

⇒  4x=40

∴  x=10

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