As a promotion, a clothing company sent out an email with a link where the recipients have a 20 probability of receiving a 40% off
coupon. Otherwise, they receive a 5% off coupon. If 480 of the recipients click the link, which of the following is the best prediction
of the number of recipients that received a 40% off coupon?
A. 2
B. 48
C. 12
D. 24

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?