The mean of frequency distribution is 8.1, and let us find the value of k.

Let us fill in the blanks :

i. Mean, median, mode are measures of ________.

ii. If mean of x₁,x₂,x₃……..x_n is mean of ax₁,ax₂,ax₃……..ax_n is _________.

iii. At the time of finding arithmetic mean, the lengths of all classes are _______.

Short answer type question :

Let us find the difference between upper class limit in median class and lower class limit of modal class of the above frequency distribution table.

The following frequency distribution shows the time taken to complete 100 metre hardle race of 150 athletics :

Let us find the difference between the upper class limit of modal class and lower class limit of modal class.

If and let us find the value of

Let us write the modal class from the above frequency distribution table.