alleryএকটি শ্রেণীতে বালক ও বালিকার অনুপাত 4 : 5 এবং বালিকার সংখ্যা বালকের সংখ্যা অপেক্ষা 12 বেশি। মোট ছাত্রছাত্রীর সংখ্যা হলো
A104
B100
C108
D96
Answer & Solution
Correct answer: C. 108
এক ভাগ হলো 12, সুতরাং শ্রেণীতে 9 x 12 = 108 জন ছাত্রছাত্রী আছে।
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