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rajiv

· started a discussion

· 1 Months ago

data different (Question: 129494.0 )

how to 45% calculate

Question:

In a test, minimum passing percentage for girls and boys is 30% and 45% respectively. A boy scored 280 marks and failed by 80 marks. How many more marks did a girl require to pass in the test if she scored 108 marks?

Options:
A) 132
B) 140
C) 160
D) 112
E) None of these
Solution:
Ans: (a) If the maximum marks of examination be x.

Then, \(\cfrac{x\times45}{100}=280+80=360 \)

\(\Rightarrow x=\cfrac{360\times 100}{45}=800\)

Therefore, minimum marks to pass for girls 

= 30% of 800 = 240

\(\therefore\) Required difference = 240 - 108 = 132.


Alternate Sol:


Let max marks in subject = x
Boys gets 280 marks and failed by 80 marks, this means if he would have got (280+80) = 360 marks, he would have passed with 45%. This gives,
360/x * 100 = 45
Solve, x = 800
Let a girl needs y more marks to pass
Then (108+y)/800 * 100 = 30
Solve, y = 132

Knowledge Expert

· commented

· 1 Months ago

@rajiv Hi Rajiv, sometimes a technical/typing issue occur, we fixed it............

rajiv

· commented

· 1 Months ago

sir this is not a fast time mistake in hindi language i informe many times but no correction in hindi language test . many mistakes in hindi language test. my accuracy speed also down

Knowledge Expert

· commented

· 1 Months ago

@rajiv Okay in Hindi language...........we fixed it.......

rajiv

· commented

· 1 Months ago

in quetion boys paased 50%

rajiv

· commented

· 1 Months ago

in quetion boys paased 50%

Knowledge Expert

· commented

· 1 Months ago

@Talented Boy Exactly

Talented Boy

· commented

· 1 Months ago

Let max marks in subject = x
Boys gets 280 marks and failed by 80 marks, this means if he would have got (280+80) = 360 marks, he would have passed with 45%. This gives,
360/x * 100 = 45
Solve, x = 800
Let a girl needs y more marks to pass
Then (108+y)/800 * 100 = 30
Solve, y = 132
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