Question

If the mean of 6, 7, x, 8, y, 14 is 9, then
A. x + y = 21
B. x + y = 19
C. x − y = 19
D. x − y =21

Answer 1

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(c) x - y = 19

Answer 2

B. x + y = 19

Step-by-step explanation:

Mean of 6, 7, x, 8, y, 14 is 9

N = 6

Sum = 6 + 7 + 8 + 14 + x + y = 35 + x + y

Mean = sum / N

9 = (35 + x + y) / 6

35 + x + y = 54

x + y = 54 - 35  

x + y = 19

Option B is the answer.