?% of 280 + 18% of 550 = 143.8 (a) 11 (b) 18 (c) 21 (d) 16 (e) None of these
((X/280)*100)+((18/550)*100)=143.8 (100x/280)+3.27=143.8 (100x/280)=143.8-3.27 100x=140.53*280 100x=39348.4 X=39348.4/100 X=393.48 Ans is e)none of these