Question

John has earned a 77, 76, and 84 on his first three projects of the semester. If he hopes to have an B quiz average (80 or above), what is the lowest score John can make on his fourth and final project?

Answer 1

Explanation:

John has earned a 77, 76, and 84 on his first three projects of the semester.

He hopes to have an B quiz average (80 or above).

We need to find the lowest score John can make on his fourth and final project. Let the score is x.

Average = sum of numbers/total numbers

`80=(77+76+84+x)/(4)\\\\320=237+x\\\\x=83`

So, he must score 83 or more on his fourth project so as to make average 80 re above.