the following frequency distribution write the ‘Modal class’.
Class interval 0-10 10-20 20-30 30-40 40-50
Frequency 2 6 15 4 5
Answers
Answer
30−40
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Given : frequency distribution
Class interval 0-10 10-20 20-30 30-40 40-50
Frequency 2 6 15 4 5
To Find : ‘Modal class’.
Solution:
Class interval Frequency
0-10 2
10-20 6
20-30 15
30-40 4
40-50 5
Modal class is the class with maximum frequency
15 is the max frequency of class 20-30
hence modal class = 20 - 30
Mode = 20 + 10 x ( 15 - 6 ) / (15 - 6 + 15 - 4)
= 20 + 10 x 9 / 20
= 20 + 4.5
= 24.5
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