 <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. <yor> Lẹ́yìn tí àwọn akẹ́kọ̀ọ́ tuntun ogún [20] dara pọ̀ mọ́ kíláàsì náà ní ìbẹ̀rẹ̀ ọdún ẹ̀kọ́ náà, iye àwọn akẹ́kọ̀ọ́ náà wá pọ̀ sí i di ọgọ́jọ [160] àti ogún [20] tó jẹ́ ọgọ́sàn-án [180]. Àmọ́, nígbà tó fi máa di ìparí ọdún náà, àwọn akẹ́kọ̀ọ́ tó ti kúrò ní ilé ẹ̀kọ́ náà ti di ọgọ́ta, ìyẹn 1 / 3 * 180. Iye àwọn akẹ́kọ̀ọ́ tó kù ní iléèwé náà ní òpin ọdún jẹ́ 180 - 60 = 120. Ìdáhùn náà ni 120. 