Mean

The mean of the values:5 ,12 ,6 , 17 is ........

The mean of the values : 6 , zero , 4 , 8 , 7 is --------

The mean of the values

 $x\ ,\ x-y\ ,\ y\ +x$  is .............

If the tall of 5 students in grade first prep. in cm. are 124 , 130 , 122 , 126 , 128.

Calculate the value of the mean of these lengths.

If the mean of the marks of 5 students is 20 marks , then the sum of their marks = ......... marks

If the mean of values: 3, 3, x equals 4, then x = .........

If the sum of five numbers is 30, then the mean of these numbers is ...............

If the mean of 6 values is 8, then the sum of these values is ..........