Suppose 200 students take an exam, graded on a scale of 0-100%. the median exam grade was 78%, the mean exam grade was 68%, and the range of scores was 40%. would you expect this distribution to be symmetric or skewed? does the distribution have a high or low variation?

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?