A marketing firm track data on grocery store visits in one study at finds that the probability that a shopper buys bread during a visit to the store is .60 and the probability that a shopper buys cheese is .20 event a equal a shopper buys bread event b = as a shopper buys cheese. A and B are independent event

Thats where they was ported and the fields that noone really knew much about needed tended, so they put slaves out there do free work and huge profits and so on the north decided to hold its own and was more different way of survival did not have same climate conditions to afford protecting slaves from winter so expenses be diff from south