Answer:
The only rate is 8 apples for $1.
Explanation:
When we are going to purchase then the shopkeeper says the rate of 1 apple is x$ or he says that in 1$ you can purchase x number of apples.
So, in case of a rate statement, either the price or the number of apples will be unity.
So, 24 apples for $3 is not a rate, and 12 apples for $1.5 is not a rate again 16 apples for $2 is also not a rate.
Therefore, the only rate is 8 apples for $1. (Answer)