Question

In a university examination, which was indeed very tough, 50% at least failed in "Statistics", 75% at least in "Topology", 82% at least in "Functional Analysis" and 96% at leas in "Applied Mathematics". How many at least failed in all the four?
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Answer 1

Answer:

Step-by-step explanation:

Number of students failed in Physics = atleast 70%

Number of students failed in Chemistry = atleast 72%

Number of students failed in Maths = atleast 80%

Number of students failed in English = atleast 85%

That  means,

Number of students passed in Physics = atmost 30%

Number of students passed in Chemistry = atmost 28%

Number of students passed in Maths = atmost 20%

Number of students passed in English = atmost 15%

∴ Total number of students passed in all subjects = atmost ( 30+28+20+15) % = 93%

  Total number of students failed in all the subjects = atleast (100 - 93)% =         7%

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