In An Examination, 30% And 35% Students Respectively Failed In History And Geography While 27% Students Failed In Both The Subject. If The Number Of Students Passing The Examination Is 248. Find The Total Number Of Students Who Appeared In The Exam?
In An Examination, 30% And 35% Students Respectively Failed In History And Geography While 27% Students Failed In Both The Subject. If The Number Of Students Passing The Examination Is 248. Find The Total Number Of Students Who Appeared In The Exam?
If failing 1 or more tests results in an overall fail, then.....
27% failed both, so (30-27)%=3% failed History but not Geography
and (35-27)%=8% failed Geography but not History.
Hence, (27+3+8)%=38% of the students failed the exam.
62% of the students passed which is 248.
1% of the students is $\displaystyle \frac{248}{62}=4$
Hence, 100% of the students is how many?