Mean = Sum of nos. / Count of numbers = (14+11+13+11+21+16+12)/7 = 98/7 = 14
Median = Middle term when number are arranged in ascending order (11, 11, 12, 13, 14, 16, 21) = 13
Mode = Number which is present maximum number of times (11, 11, 12, 13, 14, 16, 21) =11
Sum = 14+13+11 = 38