Subject
পেট্রোবাংলা
Topic
গ্যাস ট্রান্সমিশন কোম্পানি লিমিটেড (সহকারী ব্যবস্থাপক) - ১০.০৩.২০১৬
(লিখিত প্রশ্ন) Problem Solving (Show your Calculations / steps): A survey of n people in the town of Eros found that 50% of them prefer Brand A. Another survey of 100 people in the town of Angle 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?
(লিখিত প্রশ্ন) Problem Solving (Show your Calculations / steps): A survey of n people in the town of Eros found that 50% of them prefer Brand A. Another survey of 100 people in the town of Angle 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)
150খ)
200গ)
250ঘ)
280Explanation
যদি Total number of people in survey= x হয়, তবে A = 100 - x প্রশ্নমতে, (100 - x) x 50%+ (100 x 60%) ⇒ 5000 - 50x + 6000 = 55x [সব পক্ষ থেকে % বাদ দিয়ে] ⇒ 11,000 = 105x ∴ x = 200Related questions
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