Edexcel D1 - 17th June, 2016 [Exam discussion]

14 overall, i can't remember the break down of marks though sorry

Didn't the last question ask for the minimum cost and not the capacity?

Yes.

No because in part a it already give you inequality about cost so you wouldn't use that also the objective there was a similar question in past paper and it did same thing i did in their context so i think i am right.and the objective also is related to capacity so why would it ask for cost?

People are saying they got 50 for the via J for D's algorithm, I think I got 49

What was the cost at the end. Also what was chinese postman answer?


Posted from TSR Mobile

Didn't it ask for the cost at max capacity?

dijikstras- i think 48 and then prims-82.
i am not sure for h via j but some people say its 49
i got 40 cause i only did to j not to h.
cpa- i got 4 worker at 14:00.

Linear programming- 11 standard 4 deluxe max Capacity 17
objective should have been C=x+1.5y there was similar question in past papers.

Route: I got 459 (75 repeated) for part a then 419(start at f finish at b repeat=35)

Bipartite graph: for one mark you have to say there are 2 diff sets X and Y and for the other mark you have to set the arcs dont connect to the an element in the same set.

For Algorithm i got 135 so annoying and took long.
for why not 0.5 as x i said "as you would get negative number at the end since you have to do x=x-1 which = -0.5 so you have to chose 122. and the output was 122*0.5=61.
i am not sure this is right
another reason is that you would have to carry this on indefinitely never giving you answer if you use 0.5.



70/75 at the moment plz say my prim is right.

Didn't it ask for the cost at max capacity?

Didn't it ask for the cost at max capacity?

I literally missed out a good 10 marks just because I ran out of time, however I felt the actual questions wernt hard, hopefully I still got an A

Didn't it ask for the cost at max capacity?

For the very last question I found V as an exact value, then did point testing with integer solutions around it, subbing them back into the inequalities to see if they satisfy. In the end I got 11,4 or something. Then the last part asked for the COST. This really tripped me up and I was about to cross everything out but I then decided to sub 11 and 4 into the cost inequality that you found out in part a) or something, did anyone else get the same?

Also, for the 24y - x => 24 did anyone else get the line going through 0,1, and 24,2? that was the only way to get it on with a gradient of 1/24, please let me know if you put the same.