LAst year in a group of 30 businesses, 21 reported a net profit and 15 had investments in foreign markets. How many of the businesses did not report a net profit nor invest in foreign markets last year?
1) last year 12 of the 30 businesses reported a net profit and had inveestments in foreign markets
2) last year 24 of 30 businesses reported a net profit or invested in foreign markets, or both
1: Obviously Suff.
2: F= Foriegn, P= Profit.
F+P-FP=24. Now why do we subtract FP? Because FP is already included into F and P. Thus we need to subtract FP from F+P to find out what FP is.
Also we know F+P --> 15+21-FP=24 --> FP=12.