A.  13, 22

B.  23, 32

C.  33, 42

D.  43, 52

1
Correct Answer :
33, 42
Explanation :

Let their marks be ( x + 9 ) and x

Then, x + 9 = 56 / 100 ( x + 9 + x )

=> 25 ( x + 9 ) = 14 ( 2x + 9 )

=> 3x = 99

=> x = 33

so their marks are 33 and 33 + 9 = 42

=> 33, 42


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