PMMinimax regret decision

Hello John Moffat, I'm your follower and has been referring PM notes. Below is the question from BPP revision kit - A company wishes to decide on a selling price for a new product. Weekly sales of each product will depend on the price charge and also on customers' response to the new product. Payoff table is - Probability Price 1 Price 2 Price 3 Price 4 Price 5.00 5.50 6.00 6.50 Unit Contribution 3.00 3.50 4.00 4.50 Weekly demand Best possible 0.3 10,000 9,000 8,000 7,000 Most likely 0.5 10,000 8,000 7,500 6,000 Worst possible 0.2 6,000 5,000 4,000 3,000 If the choice of selling price is based on a minimax regret decision rule, which price should be selected? ------------------------------ My question is why probability was not considered to calculate the minmax regret decision in the BPP answer? or Did I miss reading any specific point in the question/rule? Looking for your guidance.