To find out what Mario needs to score on the next test in order to achieve an average of 85, we need to calculate the sum of his current test scores and find the difference between that sum and the desired average multiplied by 8 (since there are a total of 8 tests).
Sum of the current test scores = 70 + 82 + 95 + 81 + 78 + 82 + 93 = 581
Difference = (85 * 8) - 581 = 680 - 581 = 99
Therefore, Mario needs to score a 99 on the next test in order to achieve an average of 85.
Gathering Data Quick Check
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Question
Use the table to answer the question.
Math Test Scores (%)
Test #1 Test #2 Test #3 Test #4 Test #5 Test #6 Test #7
70 82 95 81 78 82 93
The table shows the percentages of Mario’s math test scores so far this year. If Mario wants his average to increase to an 85 after he takes the next test, what does he need to score?
(1 point)
Responses
73
73
85
85
99
99
680
680
1 answer
1 answer