Final answer:
To find the number of red apples, divide the total number of apples by the total number of parts in the ratio, then multiply that quotient by the number of parts corresponding to the red apples.
Step-by-step explanation:
To find the number of red apples, we first need to find the total number of parts in the ratio, which is 4+6=10.
Next, we divide the total number of apples by the total number of parts in the ratio: 40/10=4.
Finally, we multiply the number of parts corresponding to the red apples (which is 4) by the quotient: 4*4=16.
Therefore, there are 16 red apples in the basket.