In a game of 100 points, A can give B 20 points and C 28 points. How many points can B give C?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 10 points
“A can give B 20 points” means that when A scores 100, B scores 80. Similarly, when A scores 100, C scores 72. So in the same game:
\(A : B : C = 100 : 80 : 72\)
When B scores 100, C scores
\( \displaystyle \frac{72}{80} \times 100 = 90 \)
So in a game of 100 points, B can give C \(100 - 90 = 10\) points.