In a game of 100 points, A can give 20 points to B and 28 points to C. How many points can B give C?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 10 points
“A can give 20 points to B” means that when A scores 100, B scores 80. Similarly, when A scores 100, C scores 72. So, in the same time,
\(\text{B scores } 80 \text{ while C scores } 72\)
When B scores 100, C scores in the same ratio:
\( \displaystyle \text{C's score} = \frac{72}{80} \times 100 = 90 \)
So B can give C \(100 - 90 = 10\) points.
Tip: Points given are not subtracted directly: 28 − 20 = 8 (Option (4)) is wrong, because B’s game is out of 100, not out of 80.