vanidhar wrote:
One night a certain hotel rented 3/4 of its rooms. including 2/3 of their air conditioned rooms. if 3/5 of its rooms were air conditioned, what percent of the rooms that were not rented were air conditioned?
A. 20
B. 33 1/3
C. 35
D. 40
E. 80
Here's a step-by-step approach using theDouble Matrix method .
Here, we have a population of motel rooms, and the two characteristics are:
- air conditioning or no air conditioning
- rented or not rented
So, we can set up our matrix like this:
...
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