India Exam Junction
5. The average marks of a student in 4 subjects is 75. If the student obtained 80 marks in the fifth subject, then the new average is
72.5
76
77
77.5
Correct Answer :
76
Solution
Sum of marks in 4 subjects = 75 × 4 = 300
Sum of marks in 5 subjects = 300 + 80 = 380
New average = \({380 \over 5} = 76\)