TOKYO -- A record 17.3% of men and 14.6% of women aged between 18 and 34 said they have no intention to marry, a Japan-wide survey has shown.
设男人人数为A,女人人数为B,则有 (1-0.17)A = (1-0.07)B,
then B = 0.83/093 A = 0.892A.
总的不结婚人口比例
=(0.17A+0.07B)/(A+B)
= (0.1A + 0.07(A+B)) / (A+B)
= 0.1A/(A+B) + 0.07
= 0.1A/(A+0.892A) +0.07
= 0.1/ 1.892 +0.07
= 0.1229 = 12.29%