Each family in a neighborhood is contributing $20 worth of food to a picnic. one family is bringing 12 packages of buns. the hamburger buns coat $2.00 per package. the hot dog buns cost $1.50 per package. how many packages of each bun did the buy?

The ages of personnel in the accounting department of a large company are normally distributed with a standard deviation of 7 years. there is a 0.02275 probability that the age of any randomly chosen person in the department is less than 22 and 0.15866 probabilty that the age of any randomly chosen person is greater than 43. what is the mean of this distribution?