Ex 12.1, 9
100 surnames were randomly picked up from a local telephone directory and a frequency distribution of the number of letters in the English alphabet in the surnames was found as follows:
(i) Draw a histogram to depict the given information.
The data has class intervals of varying width.
So, we calculate adjusted frequency
Ex 12.1, 9
(ii) Write the class interval in which the maximum number of surname lie.
Maximum number of surnames lies is 6 8 as it has 44 surnames in it

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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