In a town there are 1349 families if there are an average two children attending elementary School from each family and each school can accommodate 220 student children the minimum number of elementary schools needed in the region is 6 9 or 13

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?