The arithmetic mean of the observations 83, 17, 62, 87, 62, 96, 86, 92 and 90 is:

Correct option is B

Given:

Observations: 83, 17, 62, 87, 62, 96, 86, 92, 90

Formula Used:

Mean = $$\frac{\text{Sum of all observations}}{\text{Number of observations}}$$​​

Solution:

Sum = 83 + 17 + 62 + 87 + 62 + 96 + 86 + 92 + 90 = 675

Number of observations = 9

Mean = $$\frac{675}{9} = 75$$​​