A scientist recorded 1,000 measurements in a certain experiment. If 42 percent of the measurements are less than or equal to 11 and 18 percent of the measurements are greater than 37, how many measurements are greater than 11 and less than or equal to 37 ?

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300

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400

Correct

450

500

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What this question tests

Your ability to compute percentage change, percentage of a whole, and to work backwards from a final value.

Treating successive percentage changes as additive — a 10% rise then a 10% fall is not back to the start.