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A survey of n people in the town of X found that 50% of them prefer Brand A. Another survey of 100 people in the town of Y found that 60% prefer Brand A. In total, 55% of all the people surveyed together prefer Brand A. What is the total number of people surveyed?

A. 250
B. 200
C. 170
D. 150
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সঠিক উত্তরঃ B. 200
Explanation: