Mark Scheme - Linden Education Centre


General Certificate Secondary of Education
Mathematics
43601F
Unit 1 Foundation Tier
Practice Paper Set 2
Mark Scheme
Mark Schemes
Principal Examiners have prepared these mark schemes for specimen papers. These mark schemes have
not, therefore, been through the normal process of standardising that would take place for live papers.
Further copies of this Mark Scheme are available to download from the AQA Website: www.aqa.org.uk
Copyright © 2010 AQA and its licensors. All rights reserved.
COPYRIGHT
AQA retains the copyright on all its publications. However, registered centres for AQA are permitted to copy material
from this booklet for their own internal use, with the following important exception: AQA cannot give permission to
centres to photocopy any material that is acknowledged to a third party even for internal use within the centre.
Set and published by the Assessment and Qualifications Alliance.
The Assessment and Qualifications Alliance (AQA) is a company limited by guarantee registered in England and Wales (company number 3644723) and a registered charity (registered charity number 1073334).
Registered address: AQA, Devas Street, Manchester M15 6EX
AQA GCSE Mathematics – 43601F – Mark Scheme – Practice Paper Set 2
Glossary for Mark Schemes
GCSE examinations are marked in such a way as to award positive achievement wherever possible. Thus ,
for GCSE Mathematics papers, marks are awarded under various categories.
M
Method marks are awarded for a correct method which could lead
to a correct answer.
A
Accuracy marks are awarded when following on from a correct
method. It is not necessary to always see the method. This can be
implied.
B
Marks awarded independent of method.
Q
Mark for Quality of Written Communication (QWC)
M dep
A method mark dependent on a previous method mark being
awarded.
B dep
A mark that can only be awarded if a previous independent mark
has been awarded.
ft
Follow through marks. Marks awarded following a mistake in an
earlier step.
SC
Special case. Marks awarded within the scheme for a common
misinterpretation which has some mathematical worth.
oe
Or equivalent. Accept answers that are equivalent.
eg, accept 0.5 as well as
1
2
3
AQA GCSE Mathematics – 43601F – Mark Scheme – Practice Paper Set 2
Answer
Q
Mark
Comments
30 (+) 5
M1
35
A1
1
2
M1
oe Divides Spinach bar into 2 equal parts
Bar for tomato at height 10
A1
If bar clearly wider than 1 cm M1A0
50 ÷ 20
M1
1(a)
1(b)
× 20 (= 10)
oe May see method on graph
Allow build up eg 20 + 20 + 20 = 60
1(c)
3 or 2.5
A1
5, 3, 7, 2, 4
B2
Five correct frequencies
1(d)(i)
B1 three or four correct
1(d)(ii)
21
B1ft
their 21 ÷ 5
M1
4.2 and Finn eats more on average
A1
7–2=5
B1
1(d)(iii)
Follow through their frequencies
oe
Strand (iii) Supporting answers with
explanation and evidence
The number of portions Finn eats is
more varied.
Q1
Finn eats more on average and the
number of portions is greater.
oe
ft their values
(very) unlikely
2(a)
B2
B1 for 1 correct
= 84 + 6
B1
Seen or implied eg not fair =
Their 90 ÷ 3
M1
oe
30
A1
impossible
3
4
2(b)

Meets all 3 criteria ie Spring = 6, Summer =
mode and Autumn = 2 × Winter

3
3
4
B3

B2 for two criteria correct

B1 for one correct
4
AQA GCSE Mathematics – 43601F – Mark Scheme – Practice Paper Set 2
B2 for 4 or 5 correct
4(a)
CSC, SCC, CSS, SCS, SSC, CCC
B3
B1 for at least 3 correct
ignore repetitions
oe
4(b)
2 1
( )
8 4
B1ft
ft providing a score of B1 in (a)
(£)5(.00) – (3 × (£)1.3(0))
M1
oe
(£)1.10
Q1
Strand (i)
Do not accept 1.1
40 × 1.2 (0)(+) 25 × 0.9 (0)(+) 12 × 1.3(0)
M1
oe allow one error
4(c)(i)
4(c)(ii)
Their (48 + 22.5(0) + 15.6(0))
M1dep
86.1(0) and Sunday
A1
0.02 × 400.(00)
M1
oe
0.05 × 200.(00)
M1
oe
8 or 12
A1
8 and 12 and No
A1
5
Accept 4 oe more to pay
eg 3, 5, 7 or 3.5, 4, 7.5
6(a)
Any three numbers with total 15 and
range 4
B2
B1 Total 15 or range 4
6(b)
A different set of three numbers with
total 15 and range 4
B1
5
AQA GCSE Mathematics – 43601F – Mark Scheme – Practice Paper Set 2
stem 1, 2, 3, 4 and suitable key
B1
leaves
27
B1 one error
7(a)
0245578
B2
unordered is one error
136679
04568
7(b)(i)
7(c)
8(a)
stem, leaves and aligned correctly to
show distribution
Q1
Strand (ii) Logical organised working
32
B1ft
ft
No and
(Tuesday’s median =) 40 – 50 (which is
only) 8 – 18 minutes more
B2ft
850(000)
4275(000)
M1
 100
from their diagram
B1 for partial explanation eg correct median
class for Tuesday seen
oe
19.8(9....)
A1
20 with working
850(000) ÷ 17 × 15
M1
oe
750 000
A1
70 – ((0 × 2) + 2 × 5 + 3 × 12 + 4 × 5)
(= 4)
M1
8(b)
9(a)
2 + their 4 + 5 + 12 + 5
M1 dep
28
A1
Mention of collecting data about
income and number of MP3 players or
mention of method of selecting sample
B1
eg Do a survey asking income of families and
number of MP3 players
Mention of summary statistics, a
suitable graph or other calculation for
comparison
B1
eg Plot a scatter diagram of income of families
and number of MP3 players
9(b)
eg Look for correlation and decide whether
families with higher incomes own more MP3
players.
Mention of interpreting results and link
to given hypothesis
B1
In the planning of testing any hypothesis, we
are expecting the steps of the data handling
cycle to be used
6