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The number of students in each year group of a middle school are shown in the table below.
\n\nYear | \n5 | \n6 | \n7 | \n8 | \n9 | \n
Number of students | \n{Y5} | \n{Y6} | \n{Y7} | \n{Y8} | \n{Y9} | \n
How many students are there in the school?
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