Subject
Bank Exam
Topic
Dutch-Bangla Bank Ltd. - Assistant Officer - 2017
In a class, average mark in an exam is 70. The average of students who scored below 60 is 50. The average of students who scored 60 or more is 75. If the total number of students in this class is 20, how many students scored 60 or more ?
In a class, average mark in an exam is 70. The average of students who scored below 60 is 50. The average of students who scored 60 or more is 75. If the total number of students in this class is 20, how many students scored 60 or more ?
ক)
4খ)
8গ)
10ঘ)
16ঙ)
None of theseExplanation
প্রশ্নে বলা হচ্ছে যে, একটি শ্রেণির ছাত্রদের পরীক্ষায় প্রাপ্ত গড় নম্বর 70. যারা 60 এর কম পাওয়া ছাত্র সংখ্যা হচ্ছে 50 জন । 60 কিংবা এর চেয়ে বেশি নম্বর পেয়েছে এরূপ ছাত্র সংখ্য হলো 75 জন । মোট ছাত্র সংখ্যা 20 জন হলে, কত জন ছাত্র 60 কিংবা এর চেয়ে বেশি পেয়েছে ? ধরি, Number of students who score 70 or more are x Number of students who score less than 70 are (20 - x) প্রশ্নমতে, = 70 => 75x + 1000 - 50x = 1400 => 25x = 400 x = 16 16 students scored 60 or more.Related questions
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