Final answer:
To approximate the number 20 from the given options of 10, 15, 20, and 25, the closest value is the exact number, which is choice 3: 20.
Step-by-step explanation:
The question provided seems to be asking for an approximation of the number 20 from a given set of options. To determine which option is approximately 20, we can analyze the provided data sets. It is likely that the intention behind the question is to identify the number that is closest to 20 from the listed choices.
An approximation is a value that is close to but not exactly equal to a certain number. In this specific case, the number 20 is what we want to approximate. The options given are 10, 15, 20, and 25. Clearly, the option that is closest to 20 is choice 3: 20. This is because it is the exact number we are trying to approximate.