The total number of student is given in the question.
Number of teachers are less than students, But we cannot tell exact how many teachers are there in school.
Data is insufficient, so we cannot get answer from all two statements.
According to the table in the research and development department number of employees remained nearly same during the year from 2003 to 2008.
As per given pie-chart , we can see that
The land used for rice is represented by 72°
The land used for barley is represented by 36°
? Required ratio = rice crops : barley crops
Required ratio = 72° : 36° = 2 : 1
As per given graph, we can see that,
Sales in 2002 = 2 billion dollar
Sales in 2007 = 6 billion dollar
? Required ratio = sales in 2002 : sales in 2007
Required ratio = 2 : 6 = 1 : 3
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