The average of 2,7,6 and x is 5 and the average of 18,1,6,x and y is 10. What is the value of y? Pick
A) 10  B) 20  C) 15  D) 25  E) 30
We have : (2+7+6+x) /4 = 5   15+x = 20   x = 5   (18+1+6+x+y)/5 = 10   25+5+y = 50   y = 20   Answer is 20
<result>B</result>
The average of 2,7,6 and x is 5 and the average of 18,1,6,x and y is 10. What is the value of y?