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Answer:
1440
Step-by-step explanation:
It’s 1440
Answer:
there aint no pic, mate
Step-by-step explanation:
To find the mean <span>Just add up all the numbers, then divide by how many numbers there are.
7 sets of numbers
the sum of all numbers is 105
105 </span>÷ 7 = 15
so the mean of the years is 15