Q. In an exam, the average marks scored by 25 students is 18. The average marks scored by the first 12 students is 14 and by last 12 students is 17. How many marks did the 13th student score?
There are 50 students in a class and the average mark scored by the class in Maths is 65 out of 100. The total marks scored by all the students except Karan and Arjun is 3080. If the marks scored by Karan & Arjun are same, what is the marks scored by Arjun?