2018 · Q54
What is the ratio of number of students who passed in both Physics and Chemistry to number of students who passed in both Biology and Physics but not Chemistry ?
Elementary MathematicsStatistics
- A7 : 10
- B10 : 7
- C9 : 7
- D7 : 9
Explanation
Passed both Physics and Chemistry = 30%; passed Biology and Physics but not Chemistry = 25 - 4 = 21%. The ratio is 30:21 = 10:7. Hence option B.