The tally chart shows how many bottles were found at three different beaches. Calculate the mean number of bottles per beach.
A table of beaches. Salty Cove has 5 and 5 tallies. Oyster Bay has 5, 5, and 3 tallies. West Beach has 4.
To calculate the mean number of bottles per beach, we need to find the total number of bottles found at each beach and then divide it by the number of beaches.
Salty Cove: 5 + 5 = 10 bottles
Oyster Bay: 5 + 5 + 3 = 13 bottles
West Beach: 4 bottles
Total number of bottles = 10 + 13 + 4 = 27 bottles
Number of beaches = 3
Mean number of bottles per beach = 27 / 3 = 9 bottles