Problem Solving (PS) | Re: If x=2y=4z for positive integers x, y, and z, which of the following c

HiBunuel ,Vyshak ,

If x=2y=4z for positive integers x, y, and z, which of the following can be the average (arithmetic mean) of x, y and 3z?

x=2y ==> y=x/2

x=4z ==> z=x/4

arithmetic mean of x, y and 3z =[x+(x/2)+(3x/4)] /3

=10x/12 ==>5x/6

Can somebody please tell me where am'I going wrong?