Asked by Lovepreet

Desiree's test score are 77,90,66 and 82.what score does she need on the last test in order to average 80 on her tests ?
Answered by Ms. Sue
500 * .8 = 400

77 + 90 + 66 + 82 = 315

400 - 315 = 85 needed on next test





Answered by PsyDAG
mean = ∑x/n

80 = (77+90+66+82+x)/5

Solve for x.
Answered by mria
Lakita's test scores are 77, 86, 66, and 80. What score does she need on the last test in order to average 80 on her tests?
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