There are 5 even numbers; probability is 5/10=1/2
There are 3 multiples of 3 (3, 6, 9); probability is 3/10
There are 3 perfect squares (1, 4, 9); probability=3/10
There are 4 prime numbers (2, 3, 5, 7); probability is 4/10=2/5 assuming 1 is not a prime number.