Question

ek exam me sbhi students ko sahi answer k liye 5 marks milte hai and sabhi wrong answer 2 marks cut liye jate hai agr usne 120 question k answer dekar 285 marks paye hai to usne kitne question answer sahi diye???

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Answer 1

Answer:

i think 57 was the answer

Answer 2

Answer:

75

Step-by-step explanation:

Agar maana ki usne x sawal ke sahi jawab diye.

Toh galat jawab waale sawal = (120 -x)

5x + (120-x)(-2) = 285   { pratyek wrong answer = -2)

=> 7x - 240 = 285

=> 7x = 525

=> x = 75