A student's grade depends on her score on four equally-weighted exams. Her average on the first three exams is 92. What must she
score on the fourth exam in order to guarantee a final average of at least 90?
1 answer:
3x92 = 276 (first 3 exams)
average of at least 90 (90 x 4 = 360)
360 - 276 = 84
Answer
<span>she needs to score at least 84 on the fourth exam </span><span>in order to guarantee a final average of at least 90</span>
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