UNOFFICIAL MARKSCHEME Edexcel Maths Calculator paper 09/06/2016

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I got 10 for the stratified sampling?? You can't get 10.85778 people so I rounded down but this is probs not in the markscheme

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That's exactly what I put

Reply 1201

blessingmariee

Original post by Hello201

What did you guys get for the finding the mean on which was 4 marker

of the apples? i don't quite remember but the IQR was 11.

Reply 1202

blackbolt

Hi I'm going to start and unofficial markscheme so add your answers and solutions,
Reps are not necessary but would be appreciated :smile:

It would be really useful if you could remember the question numbers
1. Order numbers correctly and include a key
b) 9/20=
0.45
2a. 5a*2b*3c =
30abc
b. Factorise fully 3y +6 =
3(y+2)
c. Expand x(x-3)=
x^2-3x
3. work out the perimeter:X=37/4 or 9.25
4. Smallest packet was best value for money because it was cheapest per bag of crisps
5. 4 times as many red than green: There were 0.4 blue and 0.15 yellow.
0.4+0.15+4x+x=1
0.55+5x=1
5x=0.45
x=0.09
4x=0.36
Green- 0.09 Red- 0.36
6a. 20.3
b. 68.04kg
c. 2.61m
7. 3.8
8a. 4:3
b. 480 pixels
9.x= 124 degrees
10. 7.92
11.£42.29
12. x=144 degrees
13.
-2 -1 0 1 2
-1 3 1 -1 3
Draw curve :frown:

should be a N shape)
14. 3 Bars
15. No, because 7766.22 was greater than 7500 pounds
16. 128g
b.11g
17. 30.1
18. 10a^5b^4
b. y= 5p^2-x
19.11 males
20. x= 0.29 or x= -2.29
21. 29.25
22. F.d- 1.6, 3.2, 2.4, 1.8, 0.3
23.28.9
24a. -1/3x+4
b. 2x/(x+1)(x-1)
25. 80.4

Reply 1203

bulbs

Original post by KamilRBL

You had to work out the value for 3.75 as both 3.7 and 3.8 were not exact. As the value for 3.7 was closer to the 3.75 value than the 3.8 value, 3.7 was the answer.

Omg its 3.8, learn how to trial and improvement plz

Reply 1204

Kajsajbas

Original post by Pst123689

Would I still get full marks for rounding down to 68 question 6b?

I did that so I hope so. I made such silly mistakes like rounding things😢😢

Reply 1205

username2219677

can someone write the marks for each question

Reply 1206

Joe.C

What was question 10 about?

Reply 1207

blackbolt

Hi I'm going to start and unofficial markscheme so add your answers and solutions,
Reps are not necessary but would be appreciated :smile:

Reply 1208

blessingmariee

Original post by KamilRBL

You had to work out the value for 3.75 as both 3.7 and 3.8 were not exact. As the value for 3.7 was closer to the 3.75 value than the 3.8 value, 3.7 was the answer.

It was 3.8 because the answer you needed was 34 and 3.75 gave you 33+ which is too small so it's somewhere between 3.75 and 3.8 so you do 3.8 as it was to 1 d.p. Hope that helps

Reply 1209

bulbs

Can you not see the mark scheme on the first page

Reply 1210

Redcoats

I got all the same answers as the unofficial mark scheme but wasn't question 11 £44.88:

18 miles distance from house to work so each day he travels 36 miles.

We're told that he has to refuel 1 gallon every 45.2 miles.

As 1 gallon = 4.546 litres (as given in the question) he has to refuel 4.546 litres every 45.2 miles (simple substitution)

If that is the case, he refuels 1 litre every 45.2/4.546 miles (9.9428 .... miles)

As he travels 36 miles he needs to refuel 36/ (9.9428 ....) times, which is 3.6207.... times in his journey

This is 3 times and 0.6207... times but one can not have 0.6207 times of refuelling so we round up to 4 times.

It was 136.9p per litre so that is 4 x 136.9 = 547.6p

Add on the cost of parking which was 350p

547.6+350 = 897.60p

Multiply by 5 days = 4488p = £44.88

Reply 1211

Pst123689

Original post by Kajsajbas

I did that so I hope so. I made such silly mistakes like rounding things😢😢

They never told you not to? So I hope we will, I just wish I left it as 68.04 to be safe

Reply 1212

willsp8

How many marks was the green and red probability question worth? I absolutely screwed that up! :s-smilie:

Reply 1213

macohe

Original post by jtb135

Wait a sec, x^3 - 5x = 34
3.7^3 - 5(3.7) = 32.153
34 - 32.153 = 1.847
So 3.7 is 1.847 away.

3.8^3 - 5(3.8) = 35.872
35.872 - 34 = 1.872
So 3.8 is 1.872 away.

This shows 3.8 being 0.025 further away than 3.7. 3.7 is closer. These are cubed numbers so even though you could round up from 3.75, the number gap changes as the numbers get bigger, so you count just assume to round up. They only care about 1d.p. numbers, using 3.75 doesnt matter. You have to find which 1d.p. is closer, and its 3.7.

i got 3.7

Reply 1214

f11sharrion

what was the context of the question for question 6?

Reply 1215

FinleyBarry

I think the last question will be a range because it depended when you rounded.
I got 80.1

Reply 1216

hello654321

Original post by KamilRBL

You had to work out the value for 3.75 as both 3.7 and 3.8 were not exact. As the value for 3.7 was closer to the 3.75 value than the 3.8 value, 3.7 was the answer.