The following table shows the customers for a certain local bank who have overdue accounts. The data is broken down by the credit card type and the number of days overdue.

Days Overdue	Platinum Card	Gold Card	Total
30 Days or Less	165	90	255
31 - 60 Days	96	121	217
61 - 90 Days	42	49	91
More than 90 Days	22	15	37
Total	325	275	600

Determine the probability that a randomly selected customer is 31 - 60 days and 61 - 90 days overdue.