Final answer:
To find the number of t-shirts in the order, you can multiply the ratio of t-shirt cards to total cards by the total number of cards.
Step-by-step explanation:
To find the number of t-shirts in the order, we need to determine the ratio of t-shirt cards to total cards. The ratio of coupon cards to t-shirt cards is given as 9:2. This means that out of every 11 cards, 9 are coupon cards and 2 are t-shirt cards.
To find the number of t-shirt cards, we can multiply the ratio by the total number of cards: 2/11 × 8250 = 1500.
Therefore, there are 1500 t-shirt cards in the order.