Question

Is there a formula for test score average questions? Such as "Bobbito got 90,45,100,75and80 on five tests. What should his next score be for him to have an average of whatever."

Answer 1

let next score be x
the (90+45+100+75+80+x)/6=the avg value
solve for x
simple eq of average no formula

Answer 2

Oh, I was over thinking I guess. Thank you :)