which is the greatest, the mean, the mode, or the medianof the data set?

here is the data set, 11, 11, 12, 12 12, 12, 13, 15, 17, 21, 21, 21

I choose the mode but my test is saying that the correct answer is the mean HELP!

Thank you for the opportunity to help you with your question!

According to given question

Mean=sum of all data /number of data

=11+11+12+12+12+12+!3+15+17+21+21+21/12

Mean=178/12=14.33

median=middle value of data

median=12

Mode=It is the value of set that occurs most offen

Mode=12

Mean is greater from mode and median

Best of luck

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