Lake A has a duck population of 30 females and 36 males. Lake B’s duck population consists of the same ratio of females to males. If 4 new female ducks are added to Lake B and no other ducks are added or removed, the new total duck population of Lake B could be which of the following? Choose the most appropriate option.
A) 144
B) 105
C) 78
D) 75
E) 36
Lake A has a duck population of 30 females and 36 males --&gt; the ratio is F:M = 30:36 = 5:6.   Lake B’s duck population consists of the same ratio of females to males --&gt; F:M = 5:6.   75
<result>D</result>
Lake A has a duck population of 30 females and 36 males. Lake B’s duck population consists of the same ratio of females to males. If 4 new female ducks are added to Lake B and no other ducks are added or removed, the new total duck population of Lake B could be which of the following?