Given:10, 21, 10, 12, 21, 10, 21, 21, 21, 12, 13, 21, 12Concept:Mode = Most repeated term of a dataThe range of the data is the difference between the largest value and the smallest value.If the total number of observation(n) is an odd number,Median = ((n + 1)/2)th termIf the total number of observations(n) is an even number,Median = ((n/2)th term + ((n/2) + 1)th term)/2Mean = (Mean + Range + Median)/3Calculations:Arranging the given terms in Ascending order,10, 10, 10, 12, 12, 12, 13, 21, 21, 21, 21, 21, 21 Most repeated term = 21 (6 times)? Mode = 21