please someone solve this question
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let total questions be x
no of right questions be r and wrong questions be w
40=3r-1w
50=4r-2w
so r=15 and w=5
total no of questions are 20
no of right questions be r and wrong questions be w
40=3r-1w
50=4r-2w
so r=15 and w=5
total no of questions are 20
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