Question

Ben bowled 129 and 204 in his first two games. What must he bowl in his third game to have an average of at least 170?

Answer 1

Answer: 160

Explanation:

Solve for X, where X is the score of the third game.

Average = (125+193+ X)/3 >/= 160

multiply both sides by three

(125+193+ X) >= 480

subtract 125 from both sides

193+ X >= 355

subtract 193 from both sides

X>= 162. Therefor he must bowl at least 162.

Check your work: (125 + 193 + 162)/3 = 160.