In a certain apartment building, there are one-bedroom and two-bedroom apartments. The rental prices of the apartment depend on a number of factors, but on average, two-bedroom apartments have higher rental prices than do one-bedroom apartments. Let M be the average rental price for all apartments in the building. If M is $1,000 higher than the average rental price for all one-bedroom apartments, and if the average rental price for all two-bedroom apartments is $9,000 higher that M, then what percentage of apartments in the building are two-bedroom apartments? Answers.
A) 50% B) 40% C) 20% D) 30% E) 10%
Ratio of 2 Bedroom Apartment: 1 Bedroom Apartment = 1000 : 9000 -----&gt; 1 : 9   Let total number of Apartments be X   No. of 2 Bedroom Apartment = (1 / 10) * X   percentage of apartments in the building are two-bedroom apartments ----&gt;   (1/10) * 100 ---&gt; 10%   Answer : 10%
<result>E</result>
In a certain apartment building, there are one-bedroom and two-bedroom apartments. The rental prices of the apartment depend on a number of factors, but on average, two-bedroom apartments have higher rental prices than do one-bedroom apartments. Let M be the average rental price for all apartments in the building. If M is $1,000 higher than the average rental price for all one-bedroom apartments, and if the average rental price for all two-bedroom apartments is $9,000 higher that M, then what percentage of apartments in the building are two-bedroom apartments?