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On-Screen Calculator Judgment
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GMAT
DI.006 On-Screen Calculator Judgment
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An index score uses 0.42(118.7) + 0.33(94.2) + 0.25(131.8). The answer choices are close. Which approach is most efficient and reliable?
A
Estimate the index as roughly between 110 and 120.
B
Use mental math by rounding all weights and scores to easy values.
C
Write out each decimal product by hand and add them.
D
Use the on-screen calculator after writing the weighted expression correctly.
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