allery৫০ জনীয়া এটা শ্ৰেণীত ৩০ জনে গণিত পঢ়ে, ২৫ জনে বিজ্ঞান পঢ়ে আৰু ১৫ জনে দুয়োটা পঢ়ে। কিমানজনে এটাও নপঢ়ে?
A5
B12
C10
D8
Answer & Solution
Correct answer: C. 10
Union = 30 + 25 - 15 = 40 জন শিক্ষাৰ্থী, গতিকে 50 - 40 = 10 জনে এটাও নপঢ়ে।
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