Review the Venn diagram. Which set of conditions is true? A. B 3 2. 1 7 8 5 9 10 4 6 O An B = 1, 3, 9, 10 A = 1, 3, 4, 8, 9, 10 B = 2, 5, 6, 7 AB=4,8 Au B = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 B = 2, 5, 6, 7 AnB=4, 8 A = 1, 3, 4, 8, 9, 10 B = 2, 4, 5, 6, 7, 8 O AU B = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 AnB = 1, 3, 4, 8, 9, 10 BnA = 2, 4, 5, 6, 7, 8​

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?