Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
The number of short students in a class is 2/5 of the total number of students. If there are 90 tall students, and the class has 400 students, calculate the total number of students with average height.

### Response:
 Kuna wanafunzi 400*2/5 = <<400*2/5=160>>160 wafupi.
Idadi ya jumla ya wanafunzi wafupi na warefu ni 160+90 = <<160+90=250>>250
Kwa kuwa kuna wanafunzi 400 katika darasa, idadi ya wanafunzi wenye urefu wa wastani ni 400-250 = <<400-250=150>>150