large number of exposure units
loss must be accidental and unintentional
loss must be determinable and measurable
chance of loss must be calculable
premium must be economically feasible
this is a list of the characteristics of ideally insurable risk. what characteristic is missing?

Jackie went to the grocery store to pick up yogurt, bread, and apples. first, she picked up a hand basket for carrying her groceries, and then she searched the store. after finding what she needed, she stood in a check-out line. then, the cashier put her items in a plastic bag, and soon after, jackie left the store. as readers of this event, we understand that jackie paid for the groceries, even though it wasn't mentioned, because we are relying on a grocery store