PEARSON AS LEVEL MATHEMATICS PAPER 21 STATIS TICS COMBINED QUESTIONS PA PE R & MARK SCHEME

Please check the examination details below before entering your candidate information
Candidate surname Other names


Centre Number Candidate Number




Pearson Edexcel Level 3 GCE
Friday 23 May 2025
Afternoon Paper
reference 8MA0/21
Mathematics
 


Advanced Subsidiary
PAPER 21: 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.

•
If pencil is used for diagrams/sketches/graphs it must be dark (HB or B).
Fill in the boxes at the top of this page with your name,
centre number and candidate number.
Answer all questions and ensure that your answers to parts of questions are clearly labelled.
• Answer the questions in the spaces provided

•
– there may be more space than you need.
You should show sufficient working to make your methods clear.

•
Answers without working may not gain full credit.
Values from statistical tables should be quoted in full. If a calculator is used instead of
tables the value should be given to an equivalent degree of accuracy.
•Information
Inexact answers should be given to three significant figures unless otherwise stated.

A booklet ‘Mathematical Formulae and Statistical Tables’ is provided.

•
The total mark for this part of the examination is 30. There are 5 questions.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.

PEARSON AS LEVEL MATHEMATICS PAPER 21 STATIS TICS
COMBINED QUESTIONS PAPER & MARK SCHEME

Read each question carefully before you start to answer it.
Try to answer every question.
• If you change your mind about an answer, cross it out and put your new answer and any
working underneath.
• Check your answers if you have time at the end. Turn over


*P76377A0112*

, 1. The random variable X ~ B(20, 0.37)
(a) Find P(X = 8)
(1)
D
(b) Find P(X 5) O
(1)
N
(c) Find P(X 5.7) O
(1)
T
W
RI
TE


IN
T
HI
S

AR
EA




D
O
N
O
T
W
RI
TE


IN
T
HI
S

AR
EA




D


*P76377A0312*
2 2
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ver  

, Question 1 continued



AR

EA

TH

IS
IN


W
RI
TE
T
N
O
D
O




AR

EA

TH

IS
IN


W
RI
TE
T
N
O
D
O


(Total for Question 1 is 3 marks)




*P76377A0312*
3 3
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ver  