If a card is randomly drawn from a set of identical cards numbered from 1 to 19, find its probability of having an odd prime number.
The probability of event occurring is equal to the number of
favorable outcomes divided by the total number of possible
outcomes in the sample space, . In this case, event is
drawing a card with an odd prime number. The cards with odd prime
numbers are 3, 5, 7, 11, 13, 17, and 19, so these are the
favorable outcomes for event . Find the probability of event