A question to maths people

Dec 06, 2005 20:42

We have the following distribution of marks for our economics course: 20% is group work and 80% is individual essay. For the group work progect we got 75 ( Read more... )

Leave a comment

Comments 5

gedhrel December 6 2005, 13:11:15 UTC
Let's say you get 75% on the group work. You get 35% on the individual assignment.

The total mark (out of 100) would be: (20/100 x 75) + (80/100 x 35).
That comes to 15 + 28 = 43.

If you get 60% for the group work and 60% for the exam in marketing, that's
(20/100 x 60) + (80/100 x 60) = 60.

Turning this around: you already have a 75% score on the group work (well done by the way!). Let's say you want the total score to be S. What score must you get on the individual essay (call that E)?

. (20 / 100 x 75) + (80 / 100 x E) = S
. 15 + (80 / 100 x E) = S
. 80 / 100 x E = S - 15
. E = ( S - 15 ) x 100 / 80

You can use that to work out what you need on the individual part: pick a value for S and work out E.

Hope that makes sense (yell if not!)

Reply

fialta December 6 2005, 13:57:35 UTC
Thank you very much, I did the same calculations, but because I'm tired 48+12 equaled 50 and I could not understand what I was doing wrong...

Reply


ihearttrombones December 7 2005, 16:39:45 UTC
ok this is going to seem really weird but, is your name Fialta? Because my name is Fialta and i was named after the book <> by Vladimir Nabokov and i've never heard about anyone else named Fialta... anyways
bye<3

Reply

fialta December 10 2005, 08:03:48 UTC
oh really? My name is Anastasia, but I chose this username as Spring in Fialta is my favourite novel by Nabokov...

Reply


alacerus December 11 2005, 09:46:22 UTC
Well done on your group mark thats really good!

Reply


Leave a comment

Up