数学机井求助！！

虚无飘渺

10. the number of M men and the number of W women were selected to be members
of one club last year. If all of the members are still in the club. Whether
there is higher percentage of women joining the club this year? a) M/2 + X =
W/2 + X X is constant b) W> M

elitist

不明白，W，M是变量还是常数，说去年M，W，看来象常数，今年又没说新参加男女的比例或什么..