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OpenStudy (anonymous):
The final exam is worth 20% of all yearly grade. What should student's least current grade be, so that he passes if he gets 100 on the final?
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OpenStudy (anonymous):
@texaschic101 @aaronq
OpenStudy (anonymous):
passing grade is 75.
OpenStudy (mosaic):
Let the student's current grade be "x". 0.8*x + 0.2*100 = 75 Solve for x.
OpenStudy (anonymous):
\[0.8x + 0.2 \times 100 = 75\]\[0.8x + 20 = 75\]\[0.8x = 55\]\[x = 55 \div 0.8 = 68.75\]
OpenStudy (anonymous):
Right ?
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OpenStudy (mosaic):
Yes!
OpenStudy (anonymous):
ty
OpenStudy (mosaic):
yw
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