Leas school is selling tickets to the annual talent show on the first day of ticket sales the schools old 3 senior citizen tickets and 7 child tickets for a total of $84 the school took in $182 on the second day by selling 7 senior citizen tickets and 14 child tickets find the price of a senior citizen ticket and the price of a child ticket

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?