1、on a certain sight-seeing tour, the ratio of the number of women to the number of children was 5 to 2, what was the number of men on the sight-seeing tour?
WOMAN : CHILDREN = 5:2
CHILDREN : MEN = 5 : 11
SO WOMAN : CHILDREN :MEN = 25 : 10 : 55
WOMAN IS LESS THAN 30,SO THE ONLY CHOICE IS 25
THEN MEN IS 55
(1) AND (2) TOGETHER CAN GET THE ANSWER
-- by 会员 小橘子 (2010/9/6 18:34:00)