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Question 51
In a group of 100 students, every student studies 8 subjects and every subject is studied by 10 students. The number of subjects are :
Solution
every student studies 8 subjects, so 100 students studies $$100\times8\ subjects$$=800 and every subject is studied by 10 students so number of subjects =$$\ \frac{\ 800}{10}\ =80$$,
Hence option 'A' is correct.
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