What are the mean and the mode of the following sets of data 5 12 1 5 7

To find the mean (average), u add up all ur numbers, then divide by how many numbers there are.

mean = (5 + 12 + 1 + 5 + 7) / 5 = 30/5 = 6

To find the mode (and there does not have to be one) ... u find the number that is used the most. That number would be 5 ... because it is used twice, whereas, the other numbers are just used once.