The given bar graph represents the number of students admitted in four schools (S1, S2, S3, S4) during two consecutive years 2017 and 2018. What is the average number of students admitted to all schools in 2018?

290 280 275 270

270

Average number of students admitted to all schools in 2018 = \(\frac{320+360+150+250 }{4}\) = \(\frac{ 1080 }{4}\) = 270