Hybrid Games Questions - - Question 8

If habitat 2 contains at least one female snake and habitat 4 contains two male lizards, then which one of the follow...

Dana-Lipson October 1, 2020

Female Lizards in Habitat 1

Hi. I'm confused as to why female lizards can't go in habitat 1? Why do they have to go in either habitat 3 or 5?

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shunhe October 1, 2020

Hi @Dana-Lipson,

Thanks for the question! So we’re asked for what could be true if habitat 2 contains at least one female snake and habitat 4 contains 2 male lizards. Well, let’s put a female snake in habitat 2, and two male lizards in habitat 4. Now what has to follow? Remember, we can’t have male lizards next to female snakes. So we know there’s no female snakes in habitats 3 and 5. So any female snakes we add have to go in habitats 1 and 2. We know that there are 4 females left, since there are 5 total females. And we know one of those is a lizard, since we already used up the two males. So we have one female lizard and three female snakes we need to place.

There’s only one female lizard that could go in habitats 3 or 5, so (A) and (B) are wrong. (C) is wrong because the female lizard has to go in (C) and (E).
?(D) is wrong because of rule 2.

(E) can happen. Put a female lizard in habitat 5, and all the female snakes in habitat 1 and 2.

Hope this helps! Feel free to ask any other questions that you might have.