Your quiz grades are 78 72 87 and 90 what score on the fifth quiz will make your average quiz grade at least 82

Quiz grades: 78, 72, 87, 90, x = ?

If you would like to know what score on the fifth quiz (x = ?) will make your average quiz grade at least 82, you can calculate this using the following steps:

(78 + 72 + 87 + 90 + x) / 5 > = 82

(327 + x) / 5 > = 82 / * 5

327 + x > = 82 * 5

x > = 410 - 327

x > = 83

Result: You have to get at least 83 on the fifth quiz.