-10% of my grade

*82
-20% of my grade
*100%
*100%
*100%
*100%
*100%
*100%
*100%
*100%
*82%
-30% of my grade
none
-40% of my grade
*76%
reply as soon as possible.
thank you!!!!

.1(82) + .2([{8 * 100} + 82]/9) + .3(0) + .4(76) = ?

Getting no credit for almost one-third of your grade really brings your average down. (The mean is greatly influenced by deviant scores.)