To say that a coin is "fair" means that when it is tossed, each of the outcomes (heads or tails) has a 50% probability of occurring. This means:

a. in the next six flips of the coin, at least three of the outcomes will be heads.
b. in the next six flips of the coin, exactly three of the outcomes will be heads.
c. in the next 6000 flips of the coin, approximately 3000 of the outcomes will be heads.
d. in the next 6000 flips of the coin, exactly 3000 of the outcomes will be heads.

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?