The frequencies of all preceding classes are added to the frequency of a class. This series is called the less than cumulative series
The cumulative frequency curve of more than ogive,
Look at the graph and think of ogive.
Recall the sum of all frequnecies is equal to n.
Recall the empirical relation between mode, mean and median.
The frequency is obtained from the y-axis.
find out the frequency of each class
No hint available
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