At a major credit card bank the percentage of people who historically apply for the Silver, Gold, and Platinum cards are 60%, 30%, and 10%...

At a major credit card bank the percentage of people who historically apply for the Silver, Gold, and Platinum cards are 60%, 30%, and 10% respectively. In a recent sample of customers responding to a promotion of 200 customers 90 applied for the Silver, 70 for the Gold, and 40 for the Platinum.  Is there any evidence to suggest that the percentages for this promotion may be different from the historical proportions?

What is the expected X2 statistic?