alleryএকটি পরীক্ষা দেয় +5 প্রতি সঠিক উত্তর এবং −2 প্রতি ভুল উত্তর; 18 উত্তরের স্কোর 55। সঠিক গণনা?
A13
B15
C14
D12
Answer & Solution
Correct answer: A. 13
c উত্তর সঠিক হলে, 5c − 2(18 − c) = 55 দেয় 7c = 91 এবং c = 13।
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