If 1-10, 11-20, 21-30, 31-40, ......., are the classes of a frequency distribution, then the upper boundary of the class 31-40 is _____.

If 1-5 , 6 -10 , 11-15 , 16-20, ..., are the classes of a frequency distribution , then the lower boundary of the class 11-15 is "_______" .

1-5 , 6-10 , 11-15 , ....... , are the classes of a distribution , the upper boundary of the class 1-5 is "_______"

The upper limit of the class 30-40 is

Consider the following distribution: The frequency of the class 30-40 is

Consider the following distribution. The frequency of the class 30-40 is

Consider the following distribution Frequency of the class 30-40 is

Consider the following distribution Frequency of the class 30-40 is

0-10 , 10 - 20 , 20 - 30 , ...., are the classes , the lower boundary of the class 20-30 is "_______" .

In 1-10, 11-20, 21-30,__Upper Boundary of class 11-20 is_____

If the class intervals of a frequency distribution are 1-10, 11-20, 21-30, ….,51-60 then the size of even class is