PDF chapter test TRY NOW

Look at the graph and answer the questions that follow.
 
1276_15.svg
 
1. The total frequency value of class intervals \(30\) - \(40\) and \(50\) - \(60\) is .
 
2. The difference between the frequency values of class intervals \(30\) - \(40\) and \(50\) - \(60\) is .