human
There are 30 fish in the tank. One third of them are blue, and half of the blue fish have spots. How many fish in the tank are blue, spotted fish?
assistant
How many blue fish are there? ** There are 30/3=<<30/3=10>>10 blue fish.
How many blue spotted fish are there? ** There are 10/2=<<10/2=5>>5 blue spotted fish.
#### 5