Homework Help: math

Posted by TUHITUHI on Thursday, October 4, 2012 at 11:11am.

in an examination there are 180 questions , 4 marks is given for each correct answers and 1 marks is subtracted for each wrong answers . if a boy scores 220 marks find the no of correct and wrong answers ???

math - Steve, Thursday, October 4, 2012 at 11:34am
If there are c correct and w wrong answers,

c+w=180
4c-w = 220

c=80
w=100

check: 4*80-100=220

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