While reading in bed with his wife Susan, Charlie heard a noise at the door. It was Sarah entering the bedroom with 4 friends. If there were also 8 people in the living room, how many people are in the house?
In the bedroom, there are 1 + 1 = <<1+1=2>>2 people in the house (Charlie and Susan).
Sarah and four friends then entered, a total of 4+1 = <<4+1=5>>5 people.
Together with Charlie and Susan, there are now 5+2 = <<5+2=7>>7 people in the bedroom.
Since there are 8 more people in the living room, the total number of people in the house is 8 + 7 = <<8+7=15>>15
#### 15