It has been given to us that an event is considered to be "significant" if its probability is less than or equal to 0.05.
Thus, we have to find the probability of the event where a 5 is drawn from a standard deck of 52 cards.
We know that there are four cards of denomination 5 in a standard deck of 52 cards and thus the probability of the required event of drawing a 5 is as:
This is greater than the required 0.05 or in other words and thus, the asked event (that of drawing a 5) is not "significant".