In NCERT book there is this step while findimg equaation for work energy theorem for a variable force. I want to know how this step was solved ? Also tell what happened to the 1/2 here.
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distribution table for the given set of scores:
39,16,30,37,53,15,16,60,58,26,28,19,20,12,14,24, 59,21,57,38,25,36,24,15,25,41,52,45,60,63,18,26,43,36,18,27,59,63,46,25,33,46,42,48,35,64,24.Take class intervals as (10−20),(20−30),.... and answer the following:
(i) What does the frequency corresponding to the third class interval mean?
(ii) What is the size of each class interval? Find the midpoint of the class interval 30−40.
匚尺卂乙ㄚ 爪ㄩ几ᗪ卂
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