allery45 জন ছাত্ৰ-ছাত্ৰীৰ এটা শ্ৰেণীত, 25 জনে ইতিহাস পঢ়ে, 20 জনে ভূগোল পঢ়ে আৰু 5 জনে এটাও নপঢ়ে। কিমানজনে দুয়োটা পঢ়ে?
A15
B10
C5
D0
Answer & Solution
Correct answer: C. 5
Union = 45 - 5 = 40। দুয়োটা = 25 + 20 - 40 = 5।
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