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 ?

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

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

[tex]24.32+24.25+18.67+y=90\implies y=22.76[/tex]

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

[tex]0.30x=22.76\implies x=\dfrac{22.76}{0.30}\approx75.87[/tex]

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 ?

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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 ?