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Sagot :
The mean of the data about students size of Mr. Sirac classes is 24.
Given students size of each of Mr. Sirac'sclasses 21,20,22,23,24,25,26,28,27 and we have to find the mean of the data.
We know that mean is the basically sum of numbers divided by the number. It is also known as average.
Mean =∑X/n where n is number of values and ∑X is sum of all the values.
∑X=21+20+22+23+24+25+26+28+27
=216
n=9
Mean is calculated by dividing sum by n.
Mean =216/9
=24
Hence the mean of the data about students size of each of Mr. Sirac classes is 24.
Learn more about mean at https://brainly.com/question/1136789
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