At a major credit card bank, the percentages of people who historically apply for the Silver, Gold and Platinum cards are 55%, 40% and 5%, respectively. In a recent study of customers responding to a promotion, of 200 customers, 127 applied for Silver, 48 for Gold and 25 for Platinum. The observed and expected data are summarised in the table below:

Use the output and your calculator to answer questions 1-3.

Card Type Observed Expected (0-E) 2/E Silver 127 110 2.627 Gold 48 Platinum 25 10 22.500