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Mean-20+20+21+21+21+21+22+22+22+22+22+22+22+22+23÷15=20.93
Median=20,20,21,21,21,21,22,22,22,22,22,22,22,22,23
= 22
Mode=22
Median=20,20,21,21,21,21,22,22,22,22,22,22,22,22,23
= 22
Mode=22
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