Mode of the observations 10, 11, 16, 17, 12, 13, 17, 16, 16, 12, 16, 10, 15, 16, 10 is

Mode of observations 0, 1, 6, 7, 7, 2, 3, 7, 6, 6, 2, 6, 7, 0, 5, 0, 6, 0, 7, 0, 7 is

If the median of observations 12, 1, 8, 54, 61, 28, 45, 35, 21, 17 is M, then what is the value of 2M + 5?

The arithmetic mean of 100 observations is 50. If 10 is added to each observation then what will be the new arithmetic mean?

The sum of deviations of a set of observations x₁, x₂, ...., xₙ measured from 50 is −10 and the sum of deviations from 46 is 70, then the number of observations is

The geometric mean of 16, 8, 4, 2 and 1 is