The answer is 24 degrees.
A ferris wheel is a circle and, like all circles, has a circumference of 360 degrees.
To find the angles between each seat bucket, we have to divide the 360degrees of the Ferris wheel between each of the seat buckets.
To do this we will use the following formula:
s = seat buckets
a = angle between seat buckets
360/s=a
360/15=a
24=a
a = 24 degrees
Therefore, there is a 24 degree angle between each seat bucket.