A total of 30 percent of the geese included in a certain migration study were male. If some of the geese migrated during the study and 10 percent of the migrating geese were male, what was the ratio of the migration rate for the male geese to the migration rate for the female geese? [Migration rate for geese of a certain sex = (number of geese of that sex migrating) / (total number of geese of that sex)] Choose the most appropriate option:
A) 1/4  B) 7/12  C) 2/3  D) 7/27  E) 8/7
Let' take the Number of geese to be 100.   Male = 30. Female = 70.   Now the second part of the Q, Let's take the Number migrated to be 20.   So we have 20 geese that migrated and out of that 10% are male i.e 10/100 *20 = 2 Geese (Males)   And now we know out of the total 20 geese , 2 are male , then 18 have to be female.   Now the ratio part , Male Geese Ratios = 2/30 = 1/15. - A   Female Geese Ratios =18/70=9/35 - B   Cross Multiply Equations A and B and you get = 7/27.   Ans 7/27
<result>D</result>
A total of 30 percent of the geese included in a certain migration study were male. If some of the geese migrated during the study and 10 percent of the migrating geese were male, what was the ratio of the migration rate for the male geese to the migration rate for the female geese? [Migration rate for geese of a certain sex = (number of geese of that sex migrating) / (total number of geese of that sex)]