Edexcel Maths GCSE - Probability Scales (F) PhysicsAndMathsTutor.
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Q1. A bag contains 4 beads.
2 beads are blue.
1 bead is red.
1 bead is yellow.
Connor takes at random a bead from the bag.
(a) On the probability scale, mark with a cross (X) the probability that he takes a blue
bead.
(1)
(b) On the probability scale, mark with a cross (X) the probability that he takes a yellow
bead.
(1)
(c) On the probability scale, mark with a cross (X) the probability that he takes a white
bead.
(1)
(Total 3 marks)
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Edexcel Maths GCSE - Probability Scales (F) PhysicsAndMathsTutor.com
M1.
Answer Mark Additional Guidance
(a) 1
X at B1 for X marked at cao (allow the X above or
below the line)
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Edexcel Maths GCSE - Probability Scales (F) PhysicsAndMathsTutor.com
(b) 1
X at
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Edexcel Maths GCSE - Probability Scales (F) PhysicsAndMathsTutor.com
(c) X at 0 1 B1 for X marked at 0 cao (allow the X above or
below the line)
Total for Question: 3 marks
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Edexcel Maths GCSE - Probability Scales (F) PhysicsAndMathsTutor.com
##
Surprisingly, parts (a) and (b) of this question were poorly answered. In (a), the cross was
often placed between ½ and 1. A lack of accuracy in positioning the cross in part (b)
accounted for many unsuccessful attempts. Part (c) usually gained full credit.
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