Answer: 1/5
Step-by-step explanation: 10,11,12,13,14,15,16,17,18, and 19 all have a one in the tents place. These are 10 numbers. Out of the 50 numbers that can possibly be chosen, only 10 have a one in the tens place. The chance of you picking these numbers is 10/50, or 1/5 when simplified