Find the mean of -12 and 28.

Find the mean of 5,15,20 , 8 and 12

Find the HCF of 12, 16 and 28.

Find the arithmetic mean of 4 and 12.

Find the arithmetic mean of 4 and 12.

Find out the mean of 12,10,20

Find the mean of 30 numbers given mean of ten of them is 12 and the mean of remaining 20 is 9 .

The mean of 10 observations is 12. If mean of first 6 observations is 13. Find the mean of remaining 4 observations.

The mean of 10 observations is 12. If mean of first 6 observations is 13. Find the mean of remaining 4 observations.

Find the mean of 25, 27, 19, 29, 21, 23, 25, 30, 28, 20 and prove that the sum of the deviation taken from the mean is zero.

Find the median of 28, 26, 17, 12, 14, 19, 27, 26, 21, 16, 15. Hence, find median.