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Mathematics, 20.07.2020 14:01 Zaayyyy

380 students in key stage 3. 240 students in key stage 4. 110 students in key stage 5. She needs a sample of 100 students stratified by key stage. Work out the number of students from key stage 3

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380 students in key stage 3. 240 students in key stage 4. 110 students in key stage 5. She needs a s...

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