The average is 23.
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It is (21+15)/2 = 36/2 = 18
Mean = Average of a set of numbers.3 + 8 + 21 + 22 + 36 = 9090/5 = 18Mean = 18
The median is 20. When a list has an even number of data, there is no one middle value, so instead you average the two middle values (in this case 18 and 22) to get the median.
Since there is an even number of them, the median is the mean average of the middle two, namely [ 22 + 24 ] /2 = 23
The median is 35.5.