Any maths wizzes out there?

[Medea]

I'm marking undergrads on (a) a final project and (b) an essay.

The Final Project is worth 70% of the grade.
The Essay is worth 30% of the grade.

If a student gets a 68 for the Final Project and a 77 for the Essay, how on earth do I do that calculation!

Please explain. Marks due very soon!

Thanks if you can help!

I think it would be:

(68 0.7) + (77 0.3) = 70.7%

I assume the 68 and 77 are %?

Briefly

0.7 x 0.68 + 0.3 x 0.77

= 0.476 + 0.231

= 0.707

= 70.7% (so I guess you round up to 71%)

You might want to check on your calculator that I've done the sums right, but that's how you do it.

Ah good, we both got the same result.

two different ways both get 70.7%
I would use a calculator and do (68 x 70%) + (77 x 30%) = score

You are all amazing.

I was trying out fractions and x's...but was a disaster.

How sad that all those years of maths at school were for naught.

I am not marking maths, you may be relieved to know.

Thank you again.