The average (arithmetic mean) weight of 5 friends is 150 pounds. If Joanne leaves the group and the new average of the group is 162 pounds. What is Joanne's weight?
Choose the most appropriate option:
A) 60	B) 78	C) 102	D) 105	E) 110
The average (arithmetic mean) weight of 5 friends is 150 pounds.   Let W be sum of weights of the four others. and J be Joanne's weight   (W + J)/5 = 150   When Joanne exits, the average is 162   W/4 = 162   W = 648   W + J = 750   J = 102   ANSWER:102
<result>C</result>
The average (arithmetic mean) weight of 5 friends is 150 pounds. If Joanne leaves the group and the new average of the group is 162 pounds. What is Joanne's weight?