2018 · Q51
What percentage of students passed in all the three subjects ?
Elementary MathematicsStatistics
- A6
- B5
- C4
- D3
Explanation
By inclusion-exclusion: 98 = 55 + 62 + 60 - (25 + 30 + 28) + x, where x passed all three subjects (2% failed all). This gives x = 4%. Hence option C.