General Instructions for Marking
1. The total number of marks for the paper is 100
2. These mark schemes use the following types of marks:
• M marks:
... [Show More] Method marks are awarded for ‘knowing a method and
attempting to apply it’, unless otherwise indicated.
• A marks: Accuracy marks can only be awarded if the relevant method
(M) marks have been earned.
• B marks are unconditional accuracy marks (independent of M marks)
• Marks should not be subdivided.
3. Abbreviations
These are some of the traditional marking abbreviations that will appear
in the mark schemes.
• bod – benefit of doubt
• ft – follow through
• the symbol will be used for correct ft
• cao – correct answer only
• cso - correct solution only. There must be no errors in this part of the
question to obtain this mark
• isw – ignore subsequent working
• awrt – answers which round to
• SC: special case
• o.e. – or equivalent (and appropriate)
• d or dep – dependent
• indep – independent
• dp decimal places
• sf significant figures
• The answer is printed on the paper or ag- answer given
4. All M marks are follow through.
A marks are ‘correct answer only’ (cao.), unless shown, for example, as A1 ft to
indicate that previous wrong working is to be followed through. After a misread
however, the subsequent A marks affected are treated as A ft, but answers
that don’t logically make sense e.g. if an answer given for a probability is >1 or
<0, should never be awarded A marks.
Question Scheme Marks AOs
1 (a) Area(R)
1
×0.5× 1+ 2(e
0.05 + e
0.2 + e
0.45
) + e
0.8 B1 1.1b
5. For misreading which does not alter the character of a question or
materially simplify it, deduct two from any A or B marks gained, in that
part of the question affected.
6. Where a candidate has made multiple responses and indicates which response
they wish to submit, examiners should mark this response.
If there are several attempts at a question which have not been crossed out,
examiners should mark the final answer which is the answer that is the most
complete.
7. Ignore wrong working or incorrect statements following a correct answer.
8. Mark schemes will firstly show the solution judged to be the most
common response expected from candidates. Where appropriate,
alternatives answers are provided in the notes. If examiners are not sure
if an answer is acceptable, they will check the mark scheme to see if an
alternative answer is given for the method used. If no such alternative
answer is provided but the response is deemed to be valid, examiners
must escalate the response for a senior [Show Less]