I don't understand how you can not know the answer to my question. It isn't a programming question, it's a question about understanding the problem you have been set.
If you genuinely don't understand how many readings you're getting in total, then you really need to go back to the question you've been set, and re-read it, and try to understand it. Don't think about coding yet, just think about understanding the scenario that you're being given.
Although I will say that I don't understand how you could possibly have written the other code you've shown us in this thread, if you really don't understand how many sensor readings you're dealing with. Which is one of the reasons why you're starting to look like a troll to some of us.