 
 <translate> After 20 new students joined the class at the start of the school year, the number of students increased to 160 + 20 = 180. However, at the end of the year, 1 / 3 * 180 = 60 students had transferred from the school. The total number of students remaining in the school at the end of the year is 180 - 60 = 120. So, the answer is 120. <ibo> Mgbe ụmụ akwụkwọ ọhụrụ 20 sonyeere klas ahụ ná mmalite afọ akwụkwọ, ọnụ ọgụgụ ụmụ akwụkwọ mụbara ruo 160 + 20 = 180. Ma, mgbe afọ ahụ gwụrụ, otu ụzọ n'ụzọ atọ n'ime otu narị na iri asatọ n'ime ha bụzi iri isii. Ọnụ ọgụgụ ụmụ akwụkwọ fọdụrụ n'ụlọ akwụkwọ ahụ na ngwụsị afọ bụ 180 - 60 = 120. Ya mere, azịza ya bụ 120. 