The average (arithmetic mean) of y numbers is x. If 30 is added to the set of numbers, then the average will be x - 6. What is the value of y in terms of x ?	Choose the correct answer:
A) x/6 - 6 B) x/6 - 5 C) x/7 - 5 D) x/5 - 7 E) x/5 - 6
(A1 + A2 + .. + Ay)/y = x   (A1 + A2 + .. + x/6 - 6y + 30)/(y+1) = x - 6   =&gt; (xy + 30)/(y+1) = x - 6   =&gt; xy + 30 = yx -6y + x - 6   =&gt; 36 = x - 6y   =&gt; 6y = x - 36   =&gt; y = x/6 - 6   x/6 - 6nswer - x/6 - 6
<result>A</result>
The average (arithmetic mean) of y numbers is x. If 30 is added to the set of numbers, then the average will be x - 6. What is the value of y in terms of x ?