Hello there!
We have 10 tiles, meaning there is 1 of every tile from 1 to 10.
So, 4 is 1/10 and any number less than 5 is 3/9 after we pick the 4.
Multiply them to get our probability.
1/10 x 3/9 = 3/90
Simplify: 3/90 = 1/30
Therefore, the probability of picking the 4 and then a number less than 5 without the 4 is 1/30.