The table shows information about the number of students in a school.
| Year Group | Total | |||||
|---|---|---|---|---|---|---|
| 7 | 8 | 9 | 10 | 11 | ||
| Boys | 71 | 65 | 59 | 55 | 48 | 298 |
| Girls | 65 | 54 | 53 | 50 | 53 | 275 |
| Total | 136 | 119 | 112 | 105 | 101 | 573 |
A teacher wants to find out what students think about the school's canteen. They decide to take a sample of 60 students stratified by age and by year group.
Calculate the number of year 11 girls in the sample.
23 exam-style questions on Edexcel AS Level Maths Data Collection, covering 1.1 Populations and Samples, 1.2 Sampling, 1.3 Non-Random Sampling, 1.4 Types of Data, and 1.5 The Large Data Set. Each one has a worked solution and a mark scheme showing where the marks go.