In three math tests, you have scored 91,95 and 88 points. You are about to take your next test. Suppose you want to have an average score of at least 90
points after all four tests. Explain a method you could use to find the score you must receive in order to average at least 90 points.
4 * 90 = 360
91 + 95 + 88 = 274
360 - 274 = ?
86
To find the score you must receive in order to average at least 90 points after all four tests, you can follow these steps:
Step 1: Calculate the total points you have scored in the three math tests so far. In this case, the total points are 91 + 95 + 88 = 274.
Step 2: Determine the minimum total points you need to average at least 90 in four tests. Since you want to average at least 90, you need a total of 90 × 4 = 360 points in total for the four tests.
Step 3: Calculate the score you need to achieve in the fourth test. To do this, subtract the total points you have scored so far from the minimum total points needed. In this case, it is 360 - 274 = 86.
Therefore, to average at least 90 points after all four tests, you need to receive a score of 86 in the fourth test.