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Sabrina wants an average of 90 on four tests. Given her scores of 96, 88, and 82, what score does she need on her next test?

89

90

91

94

To determine what score Sabrina needs on her next test to achieve an average of 90 across four tests, we first calculate the total score required to reach that average. To find the total score necessary for an average of 90 over four tests, you multiply the desired average by the number of tests: 90 (average) × 4 (tests) = 360 (total score needed). Next, we sum the scores Sabrina has achieved so far: 96 + 88 + 82 = 266. Now, to find out what score she needs on her fourth test, we subtract her current total from the total score required: 360 (total needed) - 266 (current total) = 94. Thus, Sabrina needs to score 94 on her next test in order to achieve her goal of an average of 90 across the four tests. This shows that option D is correct.

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