alleryStudy averages 2.5 h for four days. Fifth-day hours for a 3 h mean?
A4 h
B5 h
C4.5 h
D5.5 h
Answer & Solution
Correct answer: B. 5 h
The fifth day requires 5 × 3 − 4 × 2.5 = 5 hours of study.
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