One day at a school, one -twelfth of the students were absent and 20% of those present went on a field trip. If the number of students staying back in the school that day was 660, how many students are enrolled at that school ?

Created: 6 years ago | Updated: 2 years ago

900

960

1000

1220

None of these

Trust Bank Ltd Trust Bank Ltd - Assistant Officer - 30.03.2012 গণিত সেট (Set)

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best des

Student staying at the school is (100 - 20 = 80%) of the present students.

80% of the present students = 660

So, 100% or total present students = 660 x 100 / 80 = 825

But, present students = (1 - 1/12 = 11/12) of all enrolled students

Now, 11/12 of enrolled students = 825

So, all enrolled students = 825 x 12 / 11 = 900

6 years ago

0 0

Md Azizur Rahman

Founder of Satt

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যদি দুইটি সন্নিহিত কোণের সমষ্টি ১৮০° হয়, তাহলে কোণ দুইটিকে পরস্পরের সম্পূরক কোণ বলে

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One day at a school, one -twelfth of the students were absent and 20% of those present went on a field trip. If the number of students staying back in the school that day was 660, how many students are enrolled at that school ?

সেট (Set)

Related Question

1. যদি সেট A ={5, 15, 20, 30} এবং B= {3, 5, 15, 18, 20} হয় তবে নিচের কোনটি A n B নির্দেশ করবে?

3. According to a survey of business firms in a certain city, 750 firms offer their employees health insurance , 640 offer dental insurance and 280 offer health insurance and dental insurance. How many firms offer their employees health insurance or dental

4. In a group of 15 , 7 have studied Latin , 8 have studied Greek, and 3 have not studied either . How many of these studied both Latin and Greek ?

5. যদি A={ 2, 3}, B={1, 2} এবং A ও B এর উপাদানগুলোর মধ্যে x>y সম্পর্কটি বিবেচনা থাকে, তবে অন্বয়টি ---

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One day at a school, one -twelfth of the students were absent and 20% of those present went on a field trip. If the number of students staying back in the school that day was 660, how many students are enrolled at that school ?

সেট (Set)

Related Question

1. যদি সেট A ={5, 15, 20, 30} এবং B= {3, 5, 15, 18, 20} হয় তবে নিচের কোনটি A n B নির্দেশ করবে?

3. According to a survey of business firms in a certain city, 750 firms offer their employees health insurance , 640 offer dental insurance and 280 offer health insurance and dental insurance. How many firms offer their employees health insurance or dental

4. In a group of 15 , 7 have studied Latin , 8 have studied Greek, and 3 have not studied either . How many of these studied both Latin and Greek ?

5. যদি A={ 2, 3}, B={1, 2} এবং A ও B এর উপাদানগুলোর মধ্যে x>y সম্পর্কটি বিবেচনা থাকে, তবে অন্বয়টি ---

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