Your math scores are 74, 78, 90, and 91. What is the lowest score you can earn on the next test and still achieve an average of

Question

2 years ago

10

at least an 88?

1 answer:

Stella [2.4K] · Answer 1 · 2023-08-05T19:51:49+03:00

The lowest score you can earn on the next test and still achieve an average of at least an 88 is 107

Mean is the average of numbers.

Mean = sum of data/sample size

Let the lowest score be "x" such that;

Mean = 74+78+90+91+x/5

88 = 74+78+90+91+x/5

88(5) = 74+78+90+91+x

440 = 74+78+90+91+x

440 = 333 + x

x = 440 - 333

x = 107

Hence the lowest score you can earn on the next test and still achieve an average of at least an 88 is 107

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