The fact that zero is one of the numbers in a list that you want to find the mean for doesn't make it any different to workout than a mean problem without the number zero. Just add up all of the numbers and then divide that number by how many numbers are in your list.
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Finding the answer.
formula for finding mean through direct mean method: sigma fi xi /sigma fi
If there is an element of the domain that is mapped on to 0 then yes, else no.
Mean, in simple terms, is average that we learn before things like median and mode come about. Mean is just to find the number which can be used to substitute all the numbers into that one number for the same sum. For example, the mean of 0,0,3 is 1 (0+0+3=1+1+1). Rather than listening to a whole list of data, giving single numbers would save more time. After all, with the mean, you would be able to estimate the numbers. However, there is also standard deviation (for finding spread of numbers) that would be essential for the results.
finding the mean of the integers of -5,0,2,3