Mala and Bala got $75$ marks and $25$ marks respectively in an examination. The ratio of the marks scored by Mala to the total marks obtained by both of them is
$3 : 4$
$3 : 1$
$1 : 3$
$4 : 3$

3 : 4

3 : 1

1 : 3

4 : 3

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Solution

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Let $x$ and $y$ denote the marks obtained by Mala and Bala
$∴ x = 75$ and $y = 25$

Now, total marks $= x + y = 75 + 25 = 100$
$∴$ Ratio of Mala's marks to that of total marks $= x : total marks = 75 : 100 = 3 : 4$

Hence, option A is correct.

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Mala and Bala got $75$ marks and $25$ marks respectively in an examination. The ratio of the marks scored by Mala to the total marks obtained by both of them is
$3 : 4$
$3 : 1$
$1 : 3$
$4 : 3$

Let $x$ and $y$ denote the marks obtained by Mala and Bala
$∴ x = 75$ and $y = 25$

Now, total marks $= x + y = 75 + 25 = 100$
$∴$ Ratio of Mala's marks to that of total marks $= x : total marks = 75 : 100 = 3 : 4$

Hence, option A is correct.