The frequency distribution of marks obtained by students in a class test is given below .
Draw frequency polygon and ogive.

The frequency distribution of the marks obtained by 28 students in a test carrying 40 marks is given below : If the mean of the above data is 20 , then find the difference between x and y .

Below is given frequency distribution of marks (out of 100 ) obtained by students . Draw the histogram and frequency polygon on the same graph papers.

The frequency distribution of marks in Mathematics obtained by 50 students in an examination is given below. Find mode.

If for some x in R , the frequency distribution of the marks obtained by 20 students in a test is: Then the mean of the marks is:

If for some x in R , the frequency distribution of the marks obtained by 20 students in a test is: Then the mean of the marks is:

There are 60 students in a class. The followng is the frequency distribution of marks obtained by the students in a test. where x is positive integer. Determine the mean of the marks.

The step frequency distribution table of the marks obtained by female students is given below. Calculate the mean marks.

There are 60 students in a class . The following is the frequency distribution of the marks obtained by the student in a test. Where x is a positive integer. Determine the mean and standard deviation of the marks.