The total number of spaces that Paul would paint is 74.
The number of spaces Paul is going to paint is the sum of the spaces for staff, disabled and parents.
Number of spaces for staff = 10% x 200 = 20
Remaining spaces = 200 - 20 = 180
Spaces for disabled = 1/10 x 180 = 18
Spaces for parents = 2/10 x 180 = 36
Total spaces = 20 + 18 + 36 = 74
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