Simple (?) Maths Problem - Help Please

[Platypus]

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.

 

[VectraMan]

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

 

[Platypus]

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

Ta very much!!

(that's what I thought, but I wasn't sure, due to being a 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

 

[jamesbrown]

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

Moron

 

[Platypus]

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

Cheers muchly, double confirmation

 

[original PM]

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

whs

 

[mudskipper]

Jonny scores 62.85 in the first paper.

Out of what?

 

[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

 

[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