1.

a boys get 3 marks correct sum losses 2 to each incorrect sum he does 24 sum obtained 37 marks find the number of correct sum?

Answer» LET the correct SUM be X
since total attempted question = 24
THUS incorrect = 24-x
he gets 3 MARKS for correct
-2 for incorrect
thus
3(X) -2(24-x) = 37
3x-48+2x = 37
5x = 85
X = 17


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