Question

I got 97.27 from 25% exam and on the project I got 97 and it is 25% and on the practical got 93.33 from 20%.

That is 70% , there is 30% left an A is 90 and it is the final exam how much do I need to get in the final to get an A ?

Answer 1

Contribution of the exam score to your ultimate grade:
`0.25\cdot97.27\approx24.32`

Contribution of the project:
`0.25\cdot97=24.25`

Contribution of the practical:
`0.20\cdot93.33\approx18.67`

Contribution of the final exam:
`0.30x=y`, where
`x` is the score you get on the final exam and
`y` is the percentage that score contributes to your grade.

You want to end up with an A, a minimum grade of 90%, so

`24.32+24.25+18.67+y=90\implies y=22.76`

Then the minimum score you need to get on the exam is

`0.30x=22.76\implies x=(22.76)/(0.30)\approx75.87`