14. Gavin made a patio area out of square blocks that are 1 1/2 ft by by 1 1/2 ft. The area of his patio is 175 1/2 sq ft and the length is 19 1/2 ft.
a) Determine the width of his patio.
b) Determine the number of blocks Gavin used to make his patio.

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.