What will be the first class interval, if the fifth class interval is 60 - 65, the fourth class interval is 55 - 60 and a total number of classes is limited to five?
40-45
According to the given data, the class intervals should be as shown below.
1stclass interval40-452stclass interval45-503rdclass interval50-554thclass interval55-605thclass interval60-65
Therefore, the first class interval is 40-45.