Review: data and combinatorics
Answers are for parents and teachers.
1
Find the mean and the mode of 4, 9, 7, 6, 4.
Mean 6 (30 : 5), mode 4.
2
Find the median of 2, 8, 5, 3, 7, 9.
In order: 2, 3, 5, 7, 8, 9; median (5 + 7) : 2 = 6.
3
In a pie chart, how many degrees is a 30% sector?
108
4
In how many ways can one juice and one pastry be chosen from 5 juices and 6 pastries?
30
5
Six pupils' heights (cm): 148, 152, 150, 148, 155, 151. Find the range.
7