Combinatorics
Stars and Bars
Easy
Four Boxes, Min Three
20 identical balls are distributed among 4 labeled boxes. Each box must contain at least 3 balls. How many distributions are possible?
Quant interview-style problem · QS-C003
Question 6 of 60
- Main question ← current
- Follow-up 1
Think first. Use hints deliberately. Study the reasoning only when you need it.