alleryএখন বিদ্যালয়ত, ৮০ জন ছাত্ৰ-ছাত্ৰীয়ে কলা (Art), ৬০ জনে সংগীত (Music) আৰু ৩০ জনে দুয়োটা বিষয় লয়। এই দুয়োটাৰ ভিতৰত কমেও এটা বিষয় লোৱা ছাত্ৰ-ছাত্ৰীৰ সংখ্যা কিমান?
A90
B100
C105
D110
Answer & Solution
Correct answer: D. 110
কমেও এটা = n(Art ∪ Music) = 80 + 60 - 30 = 110।
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