1. If for some x = R. the frequency distribution of the marks obtained by 20 students in a test Marks 235 Frequencey (x + 1)' 2x-5 x -3x then the mean of the marks is : (1) 28 (2) 3.2 (3) 3.0 (4) 2.5

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:

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 :

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.

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 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 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 .

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.