Question
In a survey of 1,000 people, 40% preferred Brand X, 30%
preferred Brand Y, and the remaining 30% had no preference. If the survey sample is expanded to 2,500 people, how many additional people are expected to prefer Brand X, assuming the proportions remain the same?Solution
Required answer = 40% of 2500 – 40% of 1000 = 40% of 1500 = 600
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