Final answer:
The experimental probability that the next appliance Leah sells will be an oven is 2/5.
Step-by-step explanation:
To find the experimental probability that the next appliance Leah sells will be an oven, we need to find the ratio of the number of ovens sold to the total number of appliances sold. Leah recorded selling 6 ovens out of a total of (3 + 1 + 6 + 5) = 15 appliances. Therefore, the experimental probability of selling an oven is 6/15. This can be simplified to 2/5.