Random task assigner

Put the people in one box and the jobs in the other. Both lists are shuffled and the jobs dealt round-robin, so if there are six jobs and four people two people get two and nobody gets three.

Dealing round-robin over a shuffled list is what keeps the load even — the alternative, giving each job to a randomly chosen person, produces genuinely lopsided results surprisingly often. With six jobs and four people, independent random assignment gives somebody three or more jobs roughly a third of the time. Round-robin makes that impossible while keeping which person gets which job entirely random.