Homework Help: MATH

Posted by LILO on Tuesday, December 7, 2010 at 1:24pm.

Katie must take five exams in a math class. Her scores on the first four exams were 68, 66, 82, and 80. Answer the following questions:

The maximum score on an exam is 100 points. If it is not possible for Katie to achieve the required score on the exam, type np in the answer blank.

What is the minimum score must Katie get on the fifth exam for her overall mean to be at least 80? score = .

What is the minimum score must Katie get on the fifth exam for her overall mean to be at least 90? score

MATH - PsyDAG, Tuesday, December 7, 2010 at 10:55pm
Mean = Sum of scores/number o f scores

80 ≤ (68 + 66 + 82 + 80 + x)/5

Solve for x.

Do the same for 90.

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