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Paper 3 (stats) Edexcel 2023 Mark Scheme
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Paper 3 (stats) Edexcel 2023 Mark Scheme
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Please check the examination details below before entering your candidate informationCandidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Tuesday 20 June 2023
9MA0/31
Afternoon Paper
reference
Mathematics
Advanced
PAPER 31: Statistics
You must have: Total Marks
Mathematical Formulae and Statistical Tables (Green), calculator
Candidates may use any calculator allowed by Pearson regulations.
Calculators must not have the facility for symbolic algebra manipulation,
differentiation and integration, or have retrievable mathematical formulae
stored in them.
Instructions
•• Use black ink or ball-point pen.
• Fill
If pencil is used for diagrams/sketches/graphs it must be dark (HB or B).
in the boxes at the top of this page with your name,
• labelled.
centre number and candidate number.
Answer all questions and ensure that your answers to parts of questions are clearly
• Answer the questions in the spaces provided
• You
– there may be more space than you need.
should show sufficient working to make your methods clear.
• Values
Answers without working may not gain full credit.
from statistical tables should be quoted in full. If a calculator is used instead of
• Inexact answers should be given to three significant figures unless otherwise stated.
tables the value should be given to an equivalent degree of accuracy.
Information
•• AThebooklet ‘Mathematical Formulae and Statistical Tables’ is provided.
• The total mark for this part of the examination is 50. There are 6 questions.
marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
Advice
•• Read each question carefully before you start to answer it.
• Check your answers if you have time at the end.
Try to answer every question.
Turn over
P72819A
©2023 Pearson Education Ltd.
N:1/1/1/
*P72819A0120*
,1. The Venn diagram, where p and q are probabilities, shows the three events A, B and C
and their associated probabilities.
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A
B
0.13
0.05
0.25
0.3 C
p
q
(a) Find P(A)
(1)
The events B and C are independent.
(b) Find the value of p and the value of q
(3)
(c) Find P(A½B′)
(2)
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2
*P72819A0220*
, Question 1 continued
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(Total for Question 1 is 6 marks)
3
*P72819A0320* Turn over
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