In an examination in Hindi, the students of a class secured following marks. Calculate mean marksby Direct Method.
Number of Students
More than 0
50
More than 10
46
More than 20
40
More than 30
20
More than 40
10
More than 50
3
(Ans. X = 28.8 marks)
Measures of Central Tendency--Arithmetic Mean
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Explanation:
this is the answer. we will take number of students as "cf" because the number are in decreasing order from 50.
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