About Maximin, minimax, minimax regret

Hi sir,

when there is probability of outcomes provided in a question,

should I ignore when I calculate Maximin, minimax, minimax regret?

is the probability only needed for the calculation of expected value?

I watched your lectures twice last month I think you used expected value figures to come up with the answers for Maximin, minimax,

but I am not sure.

as BPP book question 88 does ignore the probability on its solution.

Looking forward to hearing from you.

Kind regards.