A waitress believes the distribution of her tips has a modelthat is slightly skewed to the left​, with a mean of ​$9.20 and astandard deviation of ​$5.80. She usually waits on about 30 partiesover a weekend of work.
​A) Estimate the probability that she will earn at least​$350.
​B) How much does she earn on the best 10​% of such​ weekends?
