May/June 2026 Paper 51

2026 · 6 questions · 18 parts · 50 marks

0/50 marks
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Q1
1(a)1(b)
–/6 mks
Q2
2(a)2(b)2(c)2(d)
–/5 mks
Q3
3(a)3(b)3(c)
–/9 mks
Q4
4(a)4(b)4(c)
–/8 mks
Q5
5(a)5(b)5(c)
–/10 mks
Q6
6(a)6(b)6(c)
–/12 mks
5(a)Counting Principles CombinatoricsMedium4 marks
Three letters are chosen at random from the 9 letters in the word RETRIEVES. Find the probability that at least one of the letters is an E.
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0 words
Probability
5(b)Counting Principles CombinatoricsMedium3 marks
Find the number of different arrangements of the 9 letters in the word RETRIEVES in which there is an R at each end and the three Es are not all together.
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0 words
Number of arrangements
5(c)Counting Principles CombinatoricsMedium3 marks
Find the number of different arrangements of the 9 letters in the word RETRIEVES in which there are exactly three letters between the two Rs.
Show your method
0 words
Number of arrangements