Solve the problem. the systolic blood pressures of the patients at a hospital are normally distributed with a mean of 136mm hg and a standard deviation of 13.8mm hg find the two blood pressures having these properties: the mean is midway between them and 90% of all blood pressures are between them.

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.