Question

In an examination, A got 10% marks less than B; B got 25% marks more than C and C got 20% less than D. If A got 360 marks out of 500, then the percentage of marks obtained by D was

• A. 70
• B. 75
• C. 80
• D. 90

Answer 1

The correct option is C 80

$A=\frac{90}{100}B,B=\frac{125}{100}C,C=\frac{80}{100}D$
$\therefore B=\frac{10}{9}A,C=\frac{4}{5}B,andD=\frac{5}{4}C$
$B=\frac{10}{9}\times 360=400$
$C=\frac{4}{5}\times 400=320$
$D=\frac{5}{4}\times 320=400$
$PercentageofD=\frac{400}{500}\times 100=80Percent$