(2009? Lushunkou District) The weather forecast reports that the temperatures in Dalian for 10 consecutive days are as follows: (Unit: ℃) 19, 22, 23, 23, 17, 20, 21, 2

(1) Average temperature in 10 days:

(19+22+23+23+17+221+23+24+24)÷10,

=216÷10,

=21.6℃

Answer: The average temperature in 10 days is 21.6℃

(2) 19, 22 , 23, 23, 17, 20, 21, 23, 24, 24,

In ascending order: 17, 19, 20, 21, 22, 23, 23, 23, 24, 24 ．

So the median: (22+23)÷2=22.5.

Mode: 23 appears 3 times, so 23 is the mode.

So the answer is: 21.6, 22.5, 23.