In an examination, 77% of the studentspassed in Science and 66% passed

1.	In an examination, 77% of the studentspassed in Science and 66% passed in Hindi,13% students failed in both the subjects and280 passed in both the subjects. Find thetotal number of students.
Answer» Let total number of students are n Number of students passed in science = 77n/100 Number of students passed in Hindi = 66n/100 Number of students passed inboth = 13n/100 Number of students failed in both = 280 Then total students= 77n/100 + 66n/100 +13n/100 - 280 We get,n = .77n +.66n +.13n - 2801.56n - n = 280.56n = 280n = 28000/56 = 500 Therefore total number of students are 500

In an examination, 77% of the studentspassed in Science and 66% passed in Hindi,13% students failed in both the subjects and280 passed in both the subjects. Find thetotal number of students.

Answer»

Let total number of students are n

Number of students passed in science = 77n/100

Number of students passed in Hindi = 66n/100

Number of students passed inboth = 13n/100

Number of students failed in both = 280

Then total students= 77n/100 + 66n/100 +13n/100 - 280

We get,n = .77n +.66n +.13n - 2801.56n - n = 280.56n = 280n = 28000/56 = 500

Therefore total number of students are 500