Answer:
20
Step-by-step explanation:
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10 15 20 25 30 35 40
25 is the median.
Before the median, the numbers are called the lower half, and after the median they are called the upper half.
So, the middle number of the upper half - the middle number of the lower half = interquartile range.
The middle number of the upper half= 35
The middle number of the lower half= 15
Interquartile range= 35-15
Interquartile range= 20
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