# If one subzone in each of the zones is designated for industrial use, then which one of the following is allowed?

Emily on May 1, 2018

A versus D

What's wrong with answer D? Could you not have 1-I, 2-IRR, and 3-IRR?

3 Replies

I have the same question

Karen on July 10, 2020

Same question. As both above. Hasnâ€™t been answered yet

Victoria on July 16, 2020

Hi all,

Sorry for the delayed response. Hopefully I can help to clear things up a bit!

Answer choice (D) is incorrect because the stimulus tells us that "by city regulation, a total of no more than three sub zones can be designated for each of the three uses." Therefore, there can only be three R sub zones.

We know that any zone which has a sub zone that is designated for housing cannot have an I sub zone and there can be no R sub zones in Z1. Therefore, we can have a maximum of three R sub zones split between Z2 and Z3.

Option 1

Z1: I
Z2: IRRR
Z3: I

This doesn't work as we cannot have three R sub zones in a zone which has an I sub zone.

Therefore, there are two iterations of Option 2

Z1: I
Z2: IRR
Z3: IR

OR

Z1: I
Z2: IR
Z3: IRR

We can see above that it is possible that there are more R sub zones in Z2 than in Z3.

Hope this is helpful! Please let us know if you have any further questions.