allery75 জন কর্মচারীর মধ্যে, 40 জন Java জানেন, 35 জন Python জানেন এবং 10 জন কোনোটিই জানেন না। কতজন উভয়ই জানেন?
A20
B10
C25
D15
Answer & Solution
Correct answer: B. 10
65 জন অন্তত একটি ভাষা জানেন, সুতরাং উভয়ই = 40 + 35 - 65 = 10।
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