In an examination 70% students pass in physics,80% passed in chemistry, 75% in maths and 85% in biology and x% of student fail in all four subjects,then minimum value of x is
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According to the question 70% students pass in physics that means 30% students failed in Physics.
Similarly 20% student failed in chemistry 25% student failed in maths and 15% student failed in biology.
Therefore minimum number of students failing in all four subjects will be
= 0.3 * 0.2 * 0.25 * 0.15
= 0.00225×100=0.225% [Ans]
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