The average (arithmetic mean) of 7, 8, 10 and 11 equals the average of 2, 9, 13, and

The average (arithmetic mean) of 7, 8, 10 and 11 equals the average of 2, 9, 13, and

Quiz

Answer/Solution

12

Steps/Work

7 + 8 + 10 + 11 = 2 + 9 + 13 + x
36 = 24 + x
Or, x = 12
Hence, Answer will be (D) 12