1.

Question no. 3 solve this urgent plz

Answer»

let no of right ANS be x and wrong be y

3x-y=40=6x-2y=80(1)

4x-2y=50(2)

(1)-(2)

2x=30

x= 15

y= 3x-40=45-40=5

so no. of questions = x+y=20





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