Answer:
10
Step-by-step explanation:
19 divided by 19 is equal to 1 so you cross out 19 and are left with "b".
190 divided by 19 is equal to 10.
b=10
You do 3/15 which is 0.2
then 0.2*20 which is 4
you can expect 4 to win a prize
hope this helps and you rate me good;)