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coolgirl26
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question on voltage
Source: Beat The GMAT — Problem Solving |
Well, the highest possible values (needed to offset the lowest possible value) for the other two readings are obviously 10 and 10. We need the average to be 8, so (10 + 10 + x) / 3 = 8. 20 + x = 24. x = 4. Pretty straightforward.
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