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
Explanation:
Given: A scored 72
A's score was 10% less than B
So, Score of B = 72/0.9 = 80
We know that B was 25% more than C
So, C × 5/4 = 80
⇒ C = 64
Now, we know that C scored 20% less than D.
So, C = 4/5 × D
⇒ 64 = 4/5 × D
⇒ D = 80 marks
Hence, 80.
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