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 :

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 following is the frequency distribution of marks obtained by the students in a test: Marks:, 0, 1, 2, 3, 4, 5 Frequency , x-2 , x , x^2 , (x+1)^2 , 2x , x+1 . Determine mean and standard deviation of the marks.

There are 60 students in a class. The following is the frequency distribution of marks obtained by the students in a test: Marks:, 0, 1, 2, 3, 4, 5 Frequency , x-2 , x , x^2 , (x+1)^2 , 2x , x+1 . Determine mean and standard deviation of the marks.

There are 60 students in a class. The following is the frequency distribution of marks obtained by the students in a test: Marks: 0 1 2 3 4 5 Frequency x-2 , x , x^2 , (x+1)^2 , 2x , x+1 Determine the mean and standard deviation.

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

The frequency distribution of marks obtained by 28 students in a test carrying 40 marks is given below: {:("Marks":,0-10,10-20,20-30,30-40),("Number of students":,6,x,y,6):} If the mean of the above data is 20, then the difference between x and y is

The frequency distribution of marks obtained by 28 students in a test carrying 40 marks is given below: {:("Marks":,0-10,10-20,20-30,30-40),("Number of students":,6,x,y,6):} If the mean of the above data is 20, then the difference between x and y is

Following is the distribution of marks in Statistics obtained by 32 students : {:("Mid - value",5,15,25,35,45,55),("Frequency",4,6,10,7,3,2):} Caculate the median marks.