Question

If the arithmetic mean of 6, 7, x, 8, y and 14 is 9, then which of the

following is true: (1)

a) x + y = 21 b) x + y = 19 c) x – y =19 d) x – y = 21​

Answer 1

Answer:

b: x+y =19

Step-by-step explanation:

arithmetic mean = sum of all observation/number of observation.

so,

6+7+x+8+y+14/6 = 9

35+x+y =54

x+y =19 answer