Percentage - Excercise 2 - Q30

Question

i. 600 students took the test on physics and chemistry. 35% students failed in physics and 45% students failed in chemistry and 40% of those who passed in chemistry also passed in physics, then how many students failed in both:

  • 162
  • 138
  • 60
  • None of these
4
Answer and Explanation
The Correct answer is : None of these
Explanation :
Physics =>Failed= 35% Passed => 65%
Chemistry=>Failed=45%=> Passed=55%
Passed in both = 22% of total student
Percentage of students who are passed in any of the physics or chemistry or both =(65+55) - 22 = 98%
>So, the percentage of students who are failed in both = 2%
Therefore, total failed (in both subjects) students = 12
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