Meena scores 40% in an examination and after review, even though her score is increased by 50%, she fails by 35 marks. if her post-review score is increased by 20% she will have 7 marks more than the passing score. the percentage score needed for passing the examination is

Question

Meena scores 40% in an examination and after review, even though her score is increased by 50%, she fails by 35 marks.  if her post-review score is increased by 20% she will have 7 marks more than the passing score. the percentage score needed for passing the examination is

Shreedhar Goyal · Answer

Let max marks = xMeena marks = 40*x/100 = 0.4xPost-review marks = 1.5*(0.4x) = 0.6xFailed by 35 marks.Therefore passing marks = 0.6x + 35Now if +20% on post-review marks => Marks = 0.6*x(1.2) = 0,72*x = 7 more marks than passing0.72*x = 0.6*x + 35 + 70.12*x = 42x = 42*100/12 = 7*100/2 = 350 marksPassing marks = 6*350/10 + 35 = 7*35Pass % = ( 7*35/350 )* 100 = 70%

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