Question

In ben's class, there were five exams given throughout the semester. if the average of his first four exams was a 90, what was his average based on all five exams?

Answer 1

Number of exams per semester = 5
Average of first four exams = 90

Therefore,
Total of first four exams = 90*4 = 360 marks

Based on 5 exams,

Average = 360/5 = 72