ttar wrote:

A hotel has 3-bed rooms and 4-bed rooms. The range of their price is $600; and the range of the 3-bed rooms is $200, what is the range of the 4-bed rooms?

1. The minimum price for the 4-bed rooms is $800

2. The difference between the highest price of a 3-bed room and the lowest price of a 4-bed room is $

You are missing a price on (2). Regardless, this should be B

You have:

Min3 < Bed3 < Min3 + 200

Min4 < Bed4 < Min3 + 600

Trying to find:

Min3 + 600 - Min4 = ?

(1) Min4 = 800

Given this, you can't find what you are looking for. Just imagine Min3 being a variable, INSUFFICIENT.

(2) Min3 + 200 - Min4 = Some Number

Min3 - Min4 = Some Number - 200

Plug this in:

600 + (Min3 - Min4) should get you the number

SUFFICIENT