Out of the 20 homes, only 13 have a personal computer.
20 goes into 60 how many times? 60/20=3
Multiply 13 by 3 because that is how many "groups" there are 13*3=39
There are 39 houses with computers
Out of 60 homes, we can expect 39 homes to have a personal computer based on the proportion of homes that have them. This was calculated using a simple proportion method. Hence, the solution is 39 homes.
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