Question

Ek Pariksha Mein 80% ladke angreji Mein Paas hai aur 85% maths Paas Hai jabki 75% Dono Mein pass hai yadhi 45 ladke Dono me fail hai to pariksha Me bethe ladko ki kul sankha btao

Answer 1

the % of students passed in either maths or english is p(english)+p(maths)-p(both)=80%+85%-75%=90%
number failed in at least one subject=100%-90%=10%
given number of students failed =45
when 10%=45
100%=450