Question

linda scored 35, 47, and 42 points on three tests. how many points should she get on the fourth test to get an average score of 50? 75 points 76 points 77 points 78 points

Answer 1

(35 + 47 + 42 + x) / 4 = 50
(124 + x) / 4 = 50....multiply both sides by 4, cancelling the 4 on the left side.
124 + x = 50 * 4
124 + x = 200
x = 200 - 124
x = 76 <===