Find the mean of the first 10 even integers

Find the mean of the first 10 even integers.

(a)          11

(b)          9

(c)           12

(d)          10

Sol:

First 10 odd integers: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20

Mean = Sum of the first 10 odd integers/Number of such integers

= (2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20)/10

= 110/10 B

= 11

Therefore, the mean of the first 10 odd integers is 11.