Lake A has a duck population of 30 females and 30 males. Lake B’s duck population consists of the same ratio of females to males. If 6 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 correct choice:
A) 144	B) 105	C) 78	D) 72	E) 36
Lake A has a duck population of 30 females and 36 males --&gt; the ratio is F:M = 30:30 = 1:1.   Lake B’s duck population consists of the same ratio of females to males --&gt; F:M = 1:1.   72
<result>D</result>
Lake A has a duck population of 30 females and 30 males. Lake B’s duck population consists of the same ratio of females to males. If 6 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?