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Sir , mam can i get solution for this question , please help with explanation , i will be glad to you , thanks🙏

Sir , mam can i get solution for this question , please help with explanation , i will be glad to you , thanks🙏

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Grade:12th pass

1 Answers

Harshit Singh
askIITians Faculty 5963 Points
3 years ago
Dear Student

let there are x students who answered all correctly

since there are x student who answered none

Equation using inclusion exclusion principle

630000−x=330000+250000+260000−100000−90000−80000+x

x=30000

it is given that to pass u need to answer atleast 2 out of 3 questions

those who answered one answer correctly also considered to be fail

Only A answered correctly330000−100000−80000+30000=180000

Only B answered correctly250000−100000−90000+30000=90000

Only C answered correctly260000−80000−90000+30000=120000

So, total failed student180000+90000+120000+30000=420000



Thanks

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