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  1. In an examination A got 25% marks more than B, B got 10% less than C and C got 25% more than D. If D got 320 marks out of 500, the marks obtained by A were
    1. 405
    2. 450
    3. 360
    4. 400
Correct Option: B

If D gets 100 marks, then
Marks obtained by C = 125
Marks obtained by B

=
125 × 90
100

Marks obtained by A
=
125 × 90
×
125
100100

∵ 100 =
125 × 125 × 90
10000

∴ 320 =
125 × 125 × 90 × 320
= 450
1000000



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