allery১০০ জন ছাত্ৰ-ছাত্ৰীৰ ভিতৰত ৬০ জনে গণিত ভাল পায়, ৫০ জনে বিজ্ঞান ভাল পায় আৰু ৪০ জনে দুয়োটা ভাল পায়। কিমানজনে কেৱল গণিত ভাল পায়?
A30
B20
C40
D60
Answer & Solution
Correct answer: B. 20
কেৱল গণিত = মুঠ গণিত - দুয়োটা = 60 - 40 = 20।
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