A standard number cube (or die) has six faces, numbered from 1 to 6. Since there is no face with the number 7, the probability of rolling a 7 is 0.
In probability terms, the probability \( P \) of an event happening is given by:
\[ P(\text{event}) = \frac{\text{number of favorable outcomes}}{\text{total number of possible outcomes}} \]
In this case:
- Number of favorable outcomes (rolling a 7) = 0
- Total number of possible outcomes (rolling any side of the die) = 6
Thus, the probability of rolling a 7 is:
\[ P(7) = \frac{0}{6} = 0 \]
So, the probability that Samantha will roll a 7 is 0.