Thefollowing table shows marks in economics of the students of a class. Calculate arithmetic mean. {:("Marks",,"Number of Students"),("More than 0",,""30),("More than 2",,""28),("More than 4",,""24),("More than 6",,""18),("More than 8",,""10):}

Thefollowing table shows marks in economics of the students of a class

1.	Thefollowing table shows marks in economics of the students of a class. Calculate arithmetic mean. {:("Marks",,"Number of Students"),("More than 0",,""30),("More than 2",,""28),("More than 4",,""24),("More than 6",,""18),("More than 8",,""10):}
Answer» Solution :Converting Cumulative Frequency Distribution into a Simple Frequency Distribution, we get the following: ARITHMETIC mean of this CONTINUOUS series is ESTIMATED below, USING DIRECT Method. `barX=(sumfm)/(sumf)=(190)/(30)=6.33` Arithmetic Mean = 6.33 marks.