a football player scores 2 goals in his fifth match thus increasing his average goals score by 0.3 . the total number of goals in his 5 matches would be
"while this question can be solved with a rather straight - forward algebra approach ( as the other posters have noted ) , it can also be solved by testing the answers . one of those numbers must be the total number of goals . . . from a tactical standpoint , it ' s best to test either answer b or answer d , so if the answer is not correct , then you would have a gauge for whether you should gohigherorlowerwith your next test . here , i ' ll start with answer a = 4 goals if . . . . total goals = 4 goals 5 th game = 2 goals 1 st 4 games = 2 goals avg . for 1 st 4 games = 2 / 4 = 0.5 goal / game avg . for all 5 games = 4 / 5 = 0.8 goals / game this is an exact match for what we ' re told in the prompt , so answer a must be the answer ."
add(subtract(multiply(const_4, 2), multiply(multiply(const_4, 5), 0.3)), 2)