Question

The average of three numbers is 20 . If two numbers are 16 and 20 , the third number is ?

Answer 1

Answer:

18 is the correct answer

Answer 2

Step-by-step explanation:

let 3rd number be x

then,

16+20+x/2 = 20

36+x = 20*2

x = 40 -36

x = 4