Question

Which value can be added to the set below without changing its mean?

{4, 10, 14, 18, 22, 22}
O 0
O 15
O 16
O 22

Answer 1

15..

Explanation:

4, 10, 14, 18, 22, 22

Mean = (4 + 10 + 14 + 18 + 22 + 22)/6

= 90/6

= 15.

Number to be added, 'y'

For the mean to be the same

(90 + y) / 7 = 15

90 + y = 15 × 7

90 + y = 105

y = 105 - 90

= 15