Final answer:
option b,The question is a mix-up and without additional context or data on the distribution of amounts received by students, it's impossible to determine how many out of a sample of 200 students are expected to receive $250 or more.
Step-by-step explanation:
The student's question seems to be a mix-up of two unrelated concepts: the number of callers one can add to a conference room (which appears to be referring to a technological or communications context) and a statistical question about expected values based on a sample size from a school year. There is no clear connection between these two ideas within the question, making it impossible to provide an accurate answer. However, if we focus on the data given, related to what a sample of 200 students might receive in terms of money, we need additional context or data to calculate how many are expected to receive $250 or more. Without this information, the answer cannot be determined.
The maximum number of callers that can be added to a Conference Room depends on the conference room software or service being used. Different conference room software and services have different capacity limits. Therefore, without knowing the specific conference room software or service, it is not possible to determine the maximum number of callers.