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

### Instruction:
A choir splits into 3 groups for their performances. The first group has 25 members, and the second group has 30 members. The third group has the remaining members of the choir. If the choir overall has 70 members, how many members are in the third group?

### Response:
 Kuna wanachama 25 + 30 = <<25+30=55>>55 katika makundi mawili ya kwanza.
Hii inamaanisha kundi la tatu lina wanachama 70 jumla - wanachama 55 katika makundi mawili ya kwanza = <<70-55=15>>15 wanachama.