$21,33,27,20,36,34,25,22,29,30(ب$

Step 1 ：Find the mean: \(\frac{21+33+27+20+36+34+25+22+29+30}{10} = 27.7\)

Step 2 ：Find the median: Sort the numbers and find the middle value: \(\frac{25+27}{2} = 26.0\)

Step 3 ：Find the mode: Since all numbers appear only once, there is no mode.

Step 4 ：\boxed{\text{Mean: 27.7, Median: 26.0, Mode: None}}