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Math Question

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Jozzz

Ok I have a quick math question for people. I'm terrible at math so don't make fun of me :P

My question is this.

The course has 3 assignments.

Assignment 1 is worth 25% of the overall mark and received a mark of 78

Assignment 2 is worth 35% of the overall mark and received a mark of 69

The current overall mark is 71.

Assignment 3 is worth 40% of the overall mark.

What is the lowest mark assignment 3 needs in order for the overall mark to be 50?

If that didn't make sense, let me know and I'll try my best to explain it better.

13 years ago*

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5 Comments
Bor

I would calculate like this:
0.25 x 78 + 0.35 x 69 + 0.4 x X = 50
X = 16

13 years ago
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AtomicWoodchuck

^ This.

13 years ago
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Jozzz

Thanks. I was interested in how you would work it out so this helped.

13 years ago
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Konquillion

^ this is correct
however normally to pass you need a min % for each assignment and to meet a min % overall.

13 years ago
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Jozzz

That is true. For this particular course you need a min of 50% on each assignment to pass the course. I was just curious on the math.

13 years ago
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Closed 13 years ago by Jozzz.