Construct a cumulative frequency distribution table from the following frequency table :
` {:( " C.I" , ,"Frequency "),( 11-20 , , 15),(21-30, ,21),(31-40, ,26),(41-50,, 18),(51-60,,13),(61-70,,15):}`

Contruct a cumulative frequency distributions table from the following frequency table:

Contruct a cumulative frequency distributions table from the following frequency table:

Construct a cumulative frequency distribution table from the frequency table given below : {:("Calss Interval","Frequency"),(1-10,12),(11-20,18),(21-30,23),(31-40,15),(41-50,10):}

Construct a cumulative, frequency distribution table from the frequency table given below : {:("Calss Interval","Frequency"),(0-8,9),(8-16,13),(16-24,12),(24-32,7),(32-40,15):}

Construct a frequency distributions table from the following cumulatvive frequency table. {:( " Class interval " , ," Cumulative Frequency "),( 0-9 , , 15),(10-19, ,23),(20-29, ,38),(30-39,, 56),(40-49,,68),(50-59,,90 ):}

Construct a frequency distribution table from the following cumulative frequency distribution : {:("Calss Interval","Frequency"),(5-10,18),(10-15,30),(15-20,46),(20-25,73),(25-30,90):}

Construct the frequency distribution table from the following cumulative frequency table : State the number of students in the age group 10 - 13.

Construct a frequency distribution table from the following cumulative frequency distribution : {:("Calss Interval","Cumulative Frequency"),(10-19,8),(20-29,19),(30-39,23),(40-49,30):}

Construct a combined histogram and frequency polygon for the following frequency distribution : {:("Calss Interval","Frequency"),(10-20,3),(20-30,5),(30-40,6),(40-50,4),(50-60,2):}

Construct the frequency distribution table from the following cumulative frequency table : State the age - group which has the least number of students .