Reply to: Simple (?) Maths Problem - Help Please

[d000hg]

Nice one Sherlock!

My kid is trying to work out what marks she needs in her 3rd year

So 75 would scrape a first, nevermind all this point blah recurring stuff

Hope she isn't doing maths or science then

She would need to target 75% although outside science I think that's rather difficult. However I think if you're on the boundary they can be lenient if your final (more important) year results are a clear first.

[jamesbrown]

It's actually 74.7666666 recurring, but if you round it down to 74.76 it'll come out as not quite 70% and he won't pass. So it needs to be 74.77.

Moron.

Shut up, you fecking feck.

[Bunk]

I suppose we have to assume that is taken into account by the 40/60% weighting.



Aaargh - scope creep!

(not saying you are the creep - just the requirements )

This is what's commonly known as "doing a Suity"

[Bunk]

It's actually 74.7666666 recurring, but if you round it down to 74.76 it'll come out as not quite 70% and he won't pass. So it needs to be 74.77.

Moron.

Hold on, is 74.76... the same as 74.77?

[OwlHoot]

If the papers have the same total marks. They often don't.

I suppose we have to assume that is taken into account by the 40/60% weighting.

Often there's a baseline requirement too - i.e. you have to 'pass' both papers, or achieve x% in both papers to get a certain grade regardless of the average.

Aaargh - scope creep!

(not saying you are the creep - just the requirements )

[Platypus]

Are you trying to work out if your kid should have got a first rather than a 2:1? Because 60:40 was the weighting of years 3 & 2, and 70% was the requirement for a 1st, on my degree

Nice one Sherlock!

My kid is trying to work out what marks she needs in her 3rd year

So 75 would scrape a first, nevermind all this point blah recurring stuff

[mudskipper]

You don't need to know, you just have to find X such that 62.85 * 0.4 + X * 0.6 equals 70

If the papers have the same total marks. They often don't.

Often there's a baseline requirement too - i.e. you have to 'pass' both papers, or achieve x% in both papers to get a certain grade regardless of the average.

[VectraMan]

70 = 0.4*62.85+0.6x
(70-25.14)/0.6=x
x=74.76

It's actually 74.7666666 recurring, but if you round it down to 74.76 it'll come out as not quite 70% and he won't pass. So it needs to be 74.77.

Moron.

[d000hg]

P.S. This is a "real world" question, not something I found on a cornflakes packet just to test you.

Are you trying to work out if your kid should have got a first rather than a 2:1? Because 60:40 was the weighting of years 3 & 2, and 70% was the requirement for a 1st, on my degree

[OwlHoot]

Out of what?

You don't need to know, you just have to find X such that 62.85 * 0.4 + X * 0.6 equals 70

[mudskipper]

Jonny scores 62.85 in the first paper.

Out of what?

[original PM]

62.85*0.40 = 25.14
70 - 25.14 = 44.86
44.86 / 0.60 = 74.77%, moron.

whs

[Platypus]

70 = 0.4*62.85+0.6x
(70-25.14)/0.6=x
x=74.76

Cheers muchly, double confirmation

[jamesbrown]

62.85*0.40 = 25.14
70 - 25.14 = 44.86
44.86 / 0.60 = 74.77%, moron.

Moron

[jamesbrown]

posting this as i am suffering from severe brain fade. I think i have the answer but need some really clever folks to check it. They're not available, so i thought i'd ask you lot

to pass an examination, two papers are taken. The first paper contributes 40% to the overall mark and the second paper contributes 60% to the overall mark.

Jonny scores 62.85 in the first paper. The overall passmark is 70. How many does he need to score in the second paper to pass?

Feel free to slag me off for being a moron, but only if you provide the correct answer, with workings to convince me that you're right.

Thanks

p.s. This is a "real world" question, not something i found on a cornflakes packet just to test you.

70 = 0.4*62.85+0.6x
(70-25.14)/0.6=x
x=74.76