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

### Instruction:
Every year 20 ducks from a flock are killed but another 30 are born.  The original flock size is 100 ducks.  After 5 years they join with another flock of 150 ducks.  How many ducks are in the combined flock?

### Response:
 Kundi la awali linapata bata 30-20=<<30-20=10>>10 kwa mwaka
Hivyo baada ya miaka 5 wamepata 10*5=<<10*5=50>>50 bata
Hivyo kundi la awali lina bata 100+50=<<100+50=150>>150
Hivyo kundi lao la pamoja lina bata 150+150=<<150+150=300>>300