Answer:0.1102
Step-by-step explanation:
To find the probability that the next customer will buy a blank card, we need to calculate the proportion of blank cards sold compared to the total number of cards sold.
Total number of cards sold = 167 (thank you cards) + 285 (birthday cards) + 56 (blank cards) = 508 cards
Probability of buying a blank card = (Number of blank cards sold) / (Total number of cards sold)
= 56 / 508
≈ 0.1102
So, the probability that the next customer will buy a blank card is approximately 0.1102.