 
<translate> A cikin ɗakin kwana, akwai mutane 1 + 1 = 2 a cikin gidan (Charlie da Susan). Sarah da abokai huɗu suka shiga, jimillar mutane 4 + 1 = 5. Tare da Charlie da Susan, yanzu akwai mutane 5 + 2 = 7 a cikin ɗakin kwana. Tun da akwai karin mutane 8 a cikin dakin zama, yawan mutanen da ke cikin gidan shine 8 + 7 = 15. Saboda haka, amsar ita ce 15. <eng> In the bedroom, there are 1 + 1 = 2 people in the house (Charlie and Susan). Sarah and four friends then entered, a total of 4 + 1 = 5 people. Together with Charlie and Susan, there are now 5 + 2 = 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 = 15.
Therefore, the answer is 15. 