Question

If the mean of the four numbers 4, 8, 2x and 12 is 10, then x is A.) 8 B.) 10 C.) 12 D.) 16

Answer 1

Answer:

$\frac{4+8+2x+12}{4} = 10$ (average formula [sum of quantity÷number of quantity]

4+8+2x+12 = 10x4

24+2x=40

2x=40-24

2x= 16

x =16/2

  = 8

Answer 2

Answer:

4+8+2x+12 = 10x4

24+2x=40

2x=40-24

2x= 16

x =16/2

 = 8

Step-by-step explanation: