Mathematics · Oct / Nov 2025 · Paper 42 · Question 6
0580
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0580/42/O/N/25 © UCLES 2025 6 One morning, a dentist has appointments for 10 patients. The stem-and-leaf diagram shows the waiting time for 8 of these patients. 0 1 4 1 0 2 9 2 1 5 5 Key: 1 | 0 represents 10 minutes The times for the two other patients, û and Q, are not shown in the stem-and-leaf diagram. The mean waiting time of all 10 patients that morning is 16 minutes. The range of waiting times is 26 minutes. Patient û waits longer than patient Q. Find the waiting time for each of patient û and patient Q. Patient û min Patient Q min [4]
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[Patient P =] 27 [Patient Q =] 16 [4]
B1 for answer P = 27
M2 for 10 × 16 – (1 + 4 + 10 + 12 + 19 + 21 + 25 + 25 + their 27) oe isw
or M1 for 10 × 16 oe + + + + + + + + + or for 1 4 1 0 1 2 1 9 21 25 25 P Q = 16 oe 10
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