Răspuns :
F+B+C= 5300 . B=C+ 1970. B=F-205 F=B+205. F|____|+205+1970. B|___+1970. C|___|. Avem 3 seg. egale+ 205+1970+1970= 5300. 5309-(1970+1970+205)=5300-4145= 1155. 1155:3=385 ( un segment). F+385+205+1970=2560. B=385+1970=2355. C=385. Verificarea 2560+2355+385=5300. 2560 femei. 2355barbati. 385 copii.