Economy, asked by amarjeetrai6949, 9 months ago

calculate the mean marks from the following data : marks:=10-20,20-30,30-40,40-50,50-60,60-70,70-80 . no of students := 5,3,4,7,2,6,13

Answers

Answered by Anonymous

0

Answer:

the frequency is 10

Explanation:

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