Answer:
67
Step-by-step explanation:
We know that, in total, he made 47 baskets, and each basket is 13 tickets.
So in total, he made 611 tickets:
47·13
=611
Next, he wanted to get [a] prize(s), but each prize costs 9 tickets, we divide the total number of tickets he has by the prize cost.
611/9
=67.88...
You obviously can't get 0.88 of a prize, so the max amount of prizes that Arthur can get is 67.
Hope this helps! :)