Question

In an examination, the score of A was 10% less than that of B, the score of B was 25% more than that of C, and the score of C was 20% less than that of D. If A scored 72, then the score of D was

• A. 80
• B. 70
• C. 90
• D. 60

Answer 1

The Correct Option is A

Given \(A= 72\)
Also, \(A=0.9×B \)
\(⇒ B=\frac{A}{0.9}\)
\(=\frac{72}{0.9}\)
\(=80.\)

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And \(B=1.25×C \)
\(⇒ C = \frac{B}{1.25}\)
\(=\frac{80}{1.25}\)
\(=64\)

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And \(C=0.8×D \)
\(⇒ D =\frac{C}{0.8} \)
\(=\frac{ 64}{0.8}\)
\(=80.\)