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:

The table shows the marks obtained by 25 students in a class test. Find the mean of the marks obtained

The table shows the marks obtained by 25 students in a class test. Find the mean of the marks obtained

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.

If for some x in R the frequency distribution of the marks obtained by 20 statement in a test is : {:("Marks",2,3,5,7),("Frequency",(x + 1^(2)),(2x - 5),(x^(2) - 3x),x):} then the mean of the marks is :

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 .

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

The frequency distribution of the marks obtained by 100 students in a test carrying 50 marks is given below. Then the mean is {:("Marks ",0-9,10-19,20-29,30-39,40-49),("No. of students "," "8," "15," "20," "45," "12):}