Mathematics · Oct / Nov 2022 · Paper 21 · Question 25
0580
As printed in the paper
The question as text
A bag contains 5 red balls, 4 blue balls and 3 green balls.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
25(a)(i)[1]
3 4 oe [1]
25(a)(ii)[1]
45 [1]
FT 60 × their (a)(i) correctly evaluated
25(b)[4]
47 66 oe [4]
5 4 4 3 3 2 × + × + ×
M3 for 1 – oe 12 11 12 11 12 11 5 4 4 3 3 2
or M2 for × + × + × oe 12 11 12 11 12 11 5 4 5 3 4 3 or × + × + × oe 12 11 12 11 12 11
or M1 for 5 4 5 3 4 3 × or × or × or 12 11 12 11 12 11 3 2 × oe 12 11 If 0 scored,
SC1 for 47 72 oe
25(c)[2]
5 [2]
M1 for correct trial to at least two balls one of which is not green
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