There are 15 apples on a market stall.
The mean number of apples in each bag is 9.
The table below shows the numbers of apples in 14 of the bags.

Number of Apples: Frequency:
7 2
8 3
9 3
10 4
11 2

Calculate the number of apples in the 15th bag.
 

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Total number of students of a school in different year is shown in the following table.
year       number of students
1996      400
1998      535
2000      472
2002      600
2004      623
Prepare a pictograph of students using one symbol of human with 2 hand and 2 leg = 100 students.
Write what each part of symbol represents how much number of students. 
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ans.Prepare a pictograph of students using one symbol of human with 2 hand and 2 leg = 100 students.
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hello 
 
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Total number of students of a school in different year is shown in the following table.
year       number of students
1996      400
1998      535
2000      472
2002      600
2004      623
Prepare a pictograph of students using one symbol of human with 2 hand and 2 leg = 100 students.
Write what each part of symbol represents how much number of students. 
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