Question

Ahmad has scored 11, 25, 27, 25, and 25 points in his five basketball games so far. How many points does he need to score in his next game so that his average (mean) is 23 points per game?

Answer 1

(11 + 25 + 27 + 25 + 25 + x) / 6 = 23
(113 + x) / 6 = 23
113 + x = 23 * 6
113 + x = 138
x = 138 - 113
x = 25 <== he needs a 25