Examination
Probability
Level
3
In an examination 70% students of a class failed in Tamil, 75% in English, 80%in Mathematics and 85% in Science. What is the least percentage of the students who failed in all four subjects?
The answer is 10.
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1 solution
Most percentage of students with any passing subject(s)
= 4 x 100% - (70 + 75 + 80 + 85)%
= 400% - 310%
= 90%
Least percentage of the students who failed in all four subjects
= 100% - 90%
= 10%