help with percentage problem?????/?

1 ⤊

help with percentage problem?????/?

ok well my grade in one of my classes is an 87%, i just finished my finnal and i got a 95 on it. the finnal is worth 30% of my finnal grade so what do i have?

2007-12-28 12:30:50 · 3 answers · asked by Jay7 2 in Science & Mathematics ➔ Mathematics

3 answers

Find another number that average all up to 30.

x+87%+95%=90%
x+182%=90%
x=-92%

2007-12-28 12:35:09 · answer #1 · answered by Anonymous · 1⤊ 0⤋

(87 times 7)+(95 times 3) = 894
Now divide by 1000
894/1000 = 0.894
You would have 89 percent, maybe they would 'give you' the 90 if you were lucky.

2007-12-28 20:54:38 · answer #2 · answered by screaming monk 6 · 0⤊ 0⤋

0.7 * 87% + 0.3 * 95% = 89.4%

2007-12-28 20:37:10 · answer #3 · answered by norman 7 · 0⤊ 0⤋