Kaleb and Eric have 1 bin of legos to build a castle. Kaleb is using 2/7 of the legos, and Eric is using the rest. What portion of the legos is Eric using?

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?