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

### Instruction:
 Darasa lina wavulana 40%. Wengine ni wasichana. Kila mvulana darasani anapata 80% kwenye mtihani wa hesabu. Kila msichana anapata 90%. Darasa lina wastani gani kwenye mtihani?


### Response:
 60% ya darasa ni wasichana kwa sababu 100% - 40% = 60%
Wastani wa darasa ni 86% kwa sababu .4(80) + .6(90) = 86