2017 · Q38
If a% of a + b% of b = 2% of ab, then what percent of a is b ?
Elementary MathematicsPercentages
- A50%
- B75%
- C100%
- DCannot be determined
Explanation
a²/100 + b²/100 = 2ab/100 gives (a−b)² = 0, so a = b. Hence b is 100% of a: option C. 'Cannot be determined' is wrong since a = b is forced.