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3 years ago

Please help will mark brainliest!! 15 POINTS!!

Mathematics

2 answers:

kodGreya [7K]3 years ago

5 0

Answer:

decrease

Step-by-step explanation:

If 89 is the highest score, Ken would need a score of 90+ to increase the mean.

$Md < 89\\Mi >89$

Md = mean decreases

Mi = mean increases

Hope this helped!

Basile [38]3 years ago

4 0

Find the mean of the first four test scores first.
(Add all numbers in set and divide by how many numbers there are)
81 + 87 + 71 + 89 = 328 / 4 = 82

Then, find the mean with the 85 added as the fifth term.
81 + 87 + 71 + 89 + 85 = 413 / 5 = 82.6

The impact that the 85 had on the mean test score was that the mean/average increased by 0.6.

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