Answer:
a
or is their a fourth answer
Explanation:
The outlier (20%) would cause her grade to decrease.
(88 + 92 + 92 + 96 + 98) / 5 = 93.2% (Before the outlier)
(88 + 92 + 92 + 96 + 98 + 20) / 6 = 81% (After)
The outlier caused her grade to decrease by 12.2%
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