Final answer:
To find the probability that the selected special is NOT vegetarian, we need to calculate the ratio of the number of non-vegetarian specials to the total number of specials. The probability that the selected special is NOT vegetarian is 7/9.
Step-by-step explanation:
The restaurant offers chicken specials numbered 1,2,3; beef specials numbered 1,2,3,4; and vegetarian specials numbered 1,2. To find the probability that the selected special is NOT vegetarian, we need to calculate the ratio of the number of non-vegetarian specials to the total number of specials.
The number of non-vegetarian specials (chicken and beef) is 3 + 4 = 7.
The total number of specials is 3 (chicken specials) + 4 (beef specials) + 2 (vegetarian specials) = 9.
Therefore, the probability that the selected special is NOT vegetarian is 7/9.