A total of 50 percent of the geese included in a certain migration study were male. If some of the geese migrated during the study and 20 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 correct choice from the following:
A) 1 / 4 B) 7 / 12 C) 2 / 3 D) 7 / 8 E) 8 / 7

Rationale: let ' take the number of geese to be 100 . male = 50 . female = 50 . 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 20 % are male i . e 20 / 100 * 20 = 4 geese ( males ) and now we know out of the total 20 geese , 4 are male , then 16 have to be female . now the ratio part , male geese ratios = 4 / 50 = 2 / 25 . - a female geese ratios = 16 / 50 = 8 / 25 - b cross multiply equations a and b and you get = 1 / 4 . ans a
Answer: A