Question

The average of 7, 9, 11, 13, x, 21 is 13. Find the value of ‘x’.

Answer 1

Answer:

answer is x = 17

Step-by-step explanation:

average = sum of all elements / n

              = 7+9+11+13+x+21/6 = 13

              = 61 + x / 6 = 13

              = 61 + x = 78

              = x = 78 - 61

                 x = 17

Answer 2

Answer:

x=17

Step-by-step explanation:

First add all the numbers other than x i.e

we get

7+9+11+13+X+21/6=13

61+X/6=13

61+X=13*6

61+x=78

x=78-61=17

Therefore value of X=17