Andrea is going to choose 2 straws from a container which contains 12 coloured straws. There are 6 yellow straws, 3 red straws, 2 green straws, and 1 blue straw. When Andrea chooses the first straw, she does not replace it before choosing the second straw. What is the probability that Andrea will choose 2 red straws?

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?