 <translate> If there are 600 people at the fair this year, the number going to the fair next year is 2 * 600 = 1200. The number of people at the fair this year and the ones going next year totals 1200 + 600 = 1800. The number of people who went to that fair last year was 200 less than those going next year, meaning there were 1200 - 200 = 1000 people at the fair last year. In the three years, the number of people at the fair will be 1800 of this and next year + 1000 of last year = 2800.
The final answer: 2800. <yor> Bí ó bá jẹ́ pé èèyàn 600 ló wà ní àríyá ọdún yìí, iye àwọn tó máa lọ sí àríyá ọdún tó ń bọ̀ ni 2 * 600 = 1200. Iye àwọn èèyàn tó wà níbi ayẹyẹ náà lọ́dún yìí àti àwọn tó máa lọ lọ́dún tó ń bọ̀ á jẹ́ 1200 + 600 = 1800. Nọmba awọn eniyan ti o lọ si apejọ naa ni ọdun to kọja jẹ 200 kere ju awọn ti o lọ ni ọdun to nbo, itumo pe awọn eniyan 1200 - 200 = 1000 wa ni apejọ naa ni ọdun to kọja. Ní ọdún mẹ́ta tó ń bọ̀, iye àwọn èèyàn tó máa wá síbi ayẹyẹ náà yóò jẹ́ ẹ̀ẹ́dẹ́gbẹ̀jọ [1,800] nínú ọdún yìí àti ẹ̀ẹ́dẹ́gbẹ̀ta [1,000] nínú ọdún tó kọjá = ẹ̀ẹ́dẹ́gbẹ̀ta ó lé ọgọ́rùn-ún [2,800]. Ìdáhùn tí wọ́n fún wa níkẹyìn ni pé: 2800. 