A survey of n people in the town A found that 50% of them prefer Brand X. Another survey of 100 people in the town B found that 60% prefer Brand X. In total, 55% of all the people surveyed together prefer Brand X. What is the total number of people surveyed?
A. 50
B. 100
C. 150
D. 200
E. 250
সঠিক উত্তরঃ
D.
200
Explanation:
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