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Daniel wants to have a 90 average in his math class at the end of the year. He is trying to determine what he needs to get on his final exam, which accounts for 10% of his grade, for this to work. Tests are weighted 50% of the grade, and he currently has a 85 for his test average; quizzes are weighted 15% of his grade, and he currently has a 95 quiz average; homework is weighted 15% of his grade and he currently has a 98 homework average; and projects are weighted 10% of his grade and he currently has a 92 project average. What is the lowest whole percentage Daniel can make on his final exam for him to end up with a 90 in the class?
A. 91 B. 92 C. 93 D. 94
i cant sowwy
i can help
85*0.5+95*0.15+98*0.15+92*0.1 = X is taking the percentage weight of each corresponding grade. This will give a mark out of 90, so X/90 Thus, to get 90 in the class, you need a total score 90/100 So, you determine X/90 + ?/10 = 90/100 which is a sample task of finding the missing value
is it a multiple choice?
you should find that he requires 93.5% on the final, or 9.35/10
You can only choose one.
So should I round?
yup he got it on the dot. u dont need me here
It's more precise if you keep the decimals 80.65/90 (unless your teacher requested to round that).
Because effectively if you round up at this stage, you are saying he'll only need 9/10 on the final. And if you do the weighted percentage calculation by considering the 9/10 grade, it won't be at 90%
(You'll find that he'll get 89.65%, and not 90%... which in real life situations might not get rounded up to 90%.. )
hey guys give Thadds2003 medals, he deserves it. That equation he did was genius, i couldnt have done it better myself
i already have one.
case closed then?
I guess I'll go with 93. Thanks :)
wtf? y does wendy have two medals?! she did nothung
OH YEAH CASE CLOSED XD
Oh well, maybe i can help you nxt time, cya
Thadds, if i follow u will you follow me back?