In one

There are 13 spines and 7 entrances in a panel house. In each entrance, there are 2 three-room and 1 two-room apartments in each of the nine spines, and in the remaining four floors, there are always 1 four-room and 2 two-room apartments on each floor. Calculate how many apartments there are in this house in total and how many of them are four-room, three-room, and two-room.

Final Answer:

a =  273
b =  28
c =  126
d =  119

Step-by-step explanation:

a=7 (9 (2+1)+4 (1+2))=273
b=7 (4 1)=28
c=7 (9 2)=126



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