Question
Download Solution PDF100টি প্রশ্নের উত্তর লিখে X পেয়েছে 340 নম্বর। যদি প্রতিটি সঠিক উত্তরের জন্য 4 নম্বর এবং ভুল উত্তরের জন্য ঋণাত্মক এক নম্বর ধার্য করা হয়, তাহলে X মহাশয় কতগুলি উত্তর ভুল লিখেছে?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFধরা যাক, X মহাশয় a সংখ্যক প্রশ্নের উত্তর ভুল লিখেছে তাহলে,
সঠিক উত্তরের সংখ্যা = (100 – a)
প্রশ্নানুসারে,
⇒ (100 – a) × 4 – a × 1 = 340
⇒ 400 – 4a – a = 340
⇒ 5a = 400 – 340 = 60
⇒ a = 60/5 = 12
Last updated on Jun 2, 2025
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