Final answer:
The question deals with calculating the probability of selecting defective resistors, requiring knowledge of probability and combinatorics, typically taught in high school mathematics.
Step-by-step explanation:
The subject of this question is Mathematics, and it appears to pertain to the high school grade level. To calculate the probability of selecting defective resistors from a package, the problem requires an understanding of basic probability and combinatorics, which is generally covered at the high school level. However, the specific question about the number of defective resistors and how many are selected is missing, hence an exact solution cannot be provided. Still, the concept usually involves calculating the total number of ways to select resistors and the number of ways to select the defective ones, and then determining the probability as the ratio of these two numbers.
For example, if we knew a package contained 10 resistors with 2 defective ones and we needed to find the probability of selecting 1 defective resistor out of 3 chosen, we would use combinations to calculate this. In general, the probability formula for such a scenario could be represented as P(X defective) = (Combinations of defective chosen) * (Combinations of non-defective chosen) / (Combinations of total resistors chosen). To solve, you would calculate each part of the formula using combinatorics and then divide accordingly.