I have 5 exams for 80 percent of my grade for the class I ma

I have 5 exams for 80 percent of my grade for the class. I made an 88, 71,77,72, and I predict an 65 on the last exam. What is my grade based on the 80 percent?

Solution

If overall grade is 80%,

Let grade in last examination be x,

Total marks obtained = 88+71+77+72+x = 308+x

Total marks available= 500

0.8= (308+x)/500

400=308+x

x= 92.