alleryএকটি স্কুলে, 80 জন শিক্ষার্থী আর্ট নেয়, 60 জন সঙ্গীত নেয় এবং 30 জন উভয়ই নেয়। কতজন এই দুটির মধ্যে অন্তত একটি নেয়?
A90
B100
C105
D110
Answer & Solution
Correct answer: D. 110
অন্তত একটি = n(Art ∪ Music) = 80 + 60 - 30 = 110।
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