Question

What did I do wrong?

Answer 1

I think it’s 1 over 100 not 1 over 10 but then again I haven’t done that in a while

Answer 2

19/100

Explanation:

probability= number of cards that have digit 3/ total number of cards

all numbers from 30-39 have the digit 3

as well as 3, 13, 23, 43, 53, 63, 73, 83, 93

so 10 instances in between 30-39 and 9 listed above,

10+9=19 and 19/100