Answer:
1/2 bucket
Explanation:
Each of the 8 buckets is 1/4 full.
The total amount of paint at the beginning is 8 × 1/4 bucket = 2 buckets.
Each student uses 1/4 of his paint. Combined, they use 1/4 of the total amount of paint in the buckets.
1/4 × 2 buckets = 1/2 bucket
Answer: 1/2 bucket