Grade A


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The table below shows the number of pupils in each year group of a school.

Year Number of Pupils
7 84
8 63
9 78
10 89
11 106
Total 420

A survey is carried out by the head teacher to see how much pupils spend at the dinner hall.  He decides to use a stratified sample of 60 pupils from the school.

a)  How many year 8 pupils should be surveyed?


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