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Calculating the mean

The following table shows the number of alligators in each body of water near Tom's house.
Body of waterNumber of alligators
Bite Swamp77
Chomp Lake00
Danger River1111
Reptile Creek1010
Find the mean number of alligators.
  • Your answer should be
  • an integer, like 66
  • a simplified proper fraction, like 3/53/5
  • a simplified improper fraction, like 7/47/4
  • a mixed number, like 1 3/41\ 3/4
  • an exact decimal, like 0.750.75
  • a multiple of pi, like 12 pi12\ \text{pi} or 2/3 pi2/3\ \text{pi}
alligators