Subject
Bank Exam
Topic
Modhumoti Bank Ltd. - Probationary Officer - 2016
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 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 ?
ক)
250খ)
200গ)
170ঘ)
150Explanation
Solution: যদি Total number of people in survey = x হয় তবে A = 100 - x প্রশ্নমতে, (100 - x) 50% + (100 60%) = x 55% => 5000 - 50x + 6000 = 55x => 11000 = 105x x = 200Related questions
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