20 is even number.
21+9=20
21
They are 16, 18 and 20.
21
In order, the numbers are 18, 21, 24 and 37. Since there are an even number (4) of them, the median is the average of the middle two. ie median = (21+24)/2 = 22.5
The probability is 11/21.
19 + 20 + 21 = 60
-21
21 or 22
21-20 = 1
20 21/32 is more precise.20 21/32 is more precise.20 21/32 is more precise.20 21/32 is more precise.
21/20 = 100*(21/20)% = (100/20)*21% = 5*21% = 105%