alleryएक चाचणी देते +5 प्रति बरोबर उत्तर आणि −2 प्रति चुकीचे; 18 उत्तरे स्कोअर 55. बरोबर मोजणी?
A13
B15
C14
D12
Answer & Solution
Correct answer: A. 13
c उत्तरे बरोबर असल्यास, 5c − 2(18 −c) = 55 देते 7c = 91 आणि c = 13.
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