what do i need to score to get atleast a 70?

Question

my year grade right now is a 75. my final exam is worth 5%. what do i need to score on the final exam to get atleast a 70?

Answer 1

your final exam is worth 5%

your 75 that you have now is worth 95%

95%*75=71.25

even if you don't take your final you will get a 71.25

if you got a 50 on your final you would have 95%*75+5%*50 which equals

71.25+2.5=73.75

if you got a 60, you would have 71.25+5%*60=71.25+3=74.25

if you got a 70, you would have 71.25+5%*70=71.25+3.5=74.75

if you got a "0" on the final you would have a 71.25+0=71.25

95%*75+5%*FINAL≥70

71.25+0.05*FINAL≥70

0.05*FINAL≥70-71.25

0.05*FINAL≥-1.25

you would have to get less than "0" to get a 70 for a year grade

you have a 71.25 year grade now no matter what you get on your final exam

however, I would still study and try to get the best possible grade