You randomly choose a letter from a hat with the letters a through j without replacing the first letter you choose the second letter find the probability of choosing a vowel and then a d

The set is:
ABCDEFGHIJ
10 letters in total

there are 3 vowels

P(First pick vowel)= 3/10

So you took one out so there's nine letters left, what's the probability of choosing the d?

P(D)= 1/9

So you add them together
3/10 + 1/9 = 30/90 = 1/3

The scale factor of what ?