Answer variants:
75
45
15
60
60
Look at the graph and complete the tabular column.
 
1276_18.svg
 
Class intervals
\(10\) - \(20\)
\(20\) - \(30\)
\(30\) - \(40\)
\(40\) - \(50\)
\(50\) - \(60\)
Frequency