alleryএকটি শহরে, 60 শতাংশ মানুষ X সংবাদপত্র পড়েন, 40 শতাংশ মানুষ Y সংবাদপত্র পড়েন এবং 20 শতাংশ মানুষ উভয়ই পড়েন। কত শতাংশ মানুষ কোনটিই পড়েন না?
A10
B20
C15
D25
Answer & Solution
Correct answer: B. 20
অন্তত একটি পড়েন এমন পাঠকের সংখ্যা = 60 + 40 - 20 = 80 শতাংশ, সুতরাং 20 শতাংশ মানুষ কোনটিই পড়েন না।
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