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Could somebody help me in a real life maths problem please!

Sorry for being annoying! Once upon a time I was really good at maths! But I am stumped as to how to work this out....

My first year of university counted for 11%

I got 60, 58, 57, 55

My second year of university counted for 44.5% as will the third year

I got 64, 63, 61, 60

I don't know my third year results yet but is it possible to get some idea of how well I'm already doing using those percentages? Doing an average of all of them I get 59.75, but I know it would be more than that because the low marks only count 11%, if that makes any sense? But really stuck on how to work it out! Thank you, I will give my (not very valuable I know) rep to who can help me!!
Reply 1
Just weight the results according to the swing they hold. Haven't got a calculator on me, but just multiply the first year results by 0.11 and the second year by 0.445, then combine those.
Reply 2
At moment u hav about 33%

if you get 60,60,60,60 in year 3 you will end up with about 60% over all... maybe just under

EDIT

found a calculator

Avg year 1 = 57.5 ................ X0.11 = 6.325
Avg year 2 = 62 .................. X0.445 = 27.59

Total so far is 33.915%

Avg 60 year 3 will give total of 60.615%
Reply 3
(60+ 58 + 57+ 55)/400 x (11/100)

+

(64 + 63 + 61 + 60)/400 x (89/200)

Is what you have as of now

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