GMATPREP -DS7
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hi i think double-matrix is the most powerful instrument here
_________ married______ not married____total
self-emp__ 39____________ 31___________ 70
not self________________________________178
total_____ 156__________92______________248
not all slots are filled, but we need only self-not married/total=31/248=1/8
_________ married______ not married____total
self-emp__ 39____________ 31___________ 70
not self________________________________178
total_____ 156__________92______________248
not all slots are filled, but we need only self-not married/total=31/248=1/8