Atelemarketing company calls telephone numbers chosen at random. it finds that 30% of calls are not completed (the party does not answer or refuses to talk), that 40% result in talking to a woman, and that 30% result in talking to a man. after that point, 45% of the women and 40% of the men actually buy something. what percent of calls result in a sale?

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?