allery90 জন শিক্ষার্থীর মধ্যে 50 জন ইংরেজিতে এবং 60 জন হিন্দিতে উত্তীর্ণ হয়েছে; প্রত্যেকেই অন্তত একটি বিষয়ে উত্তীর্ণ হয়েছে। কতজন উভয় বিষয়েই উত্তীর্ণ হয়েছে?
A20
B15
C25
D10
Answer & Solution
Correct answer: A. 20
উভয় বিষয় = 50 + 60 - 90 = 20 জন শিক্ষার্থী।
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