 
 <prompt> ```Di number of short students for one class na 2/5 of di total number of students. If dem get 90 tall students, and di class get 400 students, calculate di total number of students with average height.``` <response>: ```Di number of short students for di class na 2/5*400 = 160
Di total number of short and tall students na 160+90 = 250
Since dem get 400 students for di class, di number of students with average height na 400-250 = 150

Di final answer: 150.``` 