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Sagot :
c because the interquartile range is the number in the middle but ther is no middle so what is between 70 and 80 it is 75
B because you find the median of both
Before grades drop median is 70.5
After grades drop median is 70.5
Then you find upper and lower quartile of the two
Before dropped grades is 65 for lower
Before dropped grades is 85 for upper
After dropped grades is 67.5 for lower
After dropped grades is 82.5 for upper
Then you subtract the two to find the range
85-65= 20
82.5-67.5= 15
So the answer is B
Before grades drop median is 70.5
After grades drop median is 70.5
Then you find upper and lower quartile of the two
Before dropped grades is 65 for lower
Before dropped grades is 85 for upper
After dropped grades is 67.5 for lower
After dropped grades is 82.5 for upper
Then you subtract the two to find the range
85-65= 20
82.5-67.5= 15
So the answer is B
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