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Counts vs. Rates
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GMAT
VR.095 Counts vs. Rates
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A program recorded 100 failures among 20,000 attempts before a redesign and 90 failures among 10,000 attempts afterward. The director calls the redesign an improvement because the failure count fell. Which evaluation is correct?
A
The redesign improved performance because any lower failure count proves a lower rate.
B
The failure rate fell because 90 is less than 100.
C
The two rates were equal because both counts were below 1% of 20,000.
D
Attempts are not a relevant denominator for failures.
E
The failure count fell, but the failure rate rose from 0.5% to 0.9%, so the count alone does not support improvement.
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