Your test scores are 75,93,90,82 and 85. What is the lowest score you can obtain on the next test to achieve an average of at least 86?

Question

Please help me by solving this equation step-by-step.

Answer 1

91

(75+93+90+82+85+x)/6 > 86

75+93+90+82+85 +x > 86(6) = 516

x > 516-75-93-90-82-85 = 516-425 = 91

You need at least 91 on the next test to have an average of at least 86