Posted by B on Tuesday, January 24, 2012 at 1:17pm.
Eight people in a room have an average height of 66 inches. A ninth person enters the room. How tall would he have to be to raise the average height by 0.5 inches?

Math  Statistics  Steve, Tuesday, January 24, 2012 at 1:44pm
8*66 = 528
528 + h = 9*66.5 = 598.5
h = 70.5