Final answer:
The machine can assemble 1/5 or 0.2 toys in 3 hours. Since we cannot have a fractional toy, the machine can assemble 0 toys in 3 hours.
Step-by-step explanation:
The machine takes 15 hours to assemble a toy. To find out how many toys the machine can assemble in 3 hours, we can divide the total time by the time taken to assemble one toy.
So, 15 hours ÷ 1 toy = 3 hours ÷ x toys
By cross multiplying, we get 15x = 3
Dividing both sides by 15, we get x = 3/15 = 1/5
Therefore, the machine can assemble 1/5 or 0.2 toys in 3 hours. Since we cannot have a fractional toy, the machine can assemble 0 toys in 3 hours.