Answer Happy

Question 2: Walmart is having a special sale this weekend. Customers charging purchases of more than $70 to their store credit card will be given a special Walmart Lottery card. The customer will scratch off the card, which will indicate the amount to be taken off the total amount of the purchase. Listed below are the amount of the prize and the percent of the time that amount will be deducted from the total amount of the purchase. Discount Amount $9 $14 $24 $50 T Probability .60 .30 .08 .02 a. What is the expected amount of discount that will be given to customers charging more than $70 to their store credit card? [2 marks] b. What is the standard deviation? [2 marks]