Ok, we need to find the probability you drawing a single card and the odds in favor do not draw a six. So, let's do it:
Drawing a single card:
Each card is unique; therefore, the chance of drawing a specific card is
1/52. There is one of each card over a total number of 52 cards.
Favor do not draw a six:
In a deck of cards there are four sixes (of spades, clubs, hearts and diamonds), so the odds in favor that you do not draw a six are subtract these four from 52, so we finally get that the odds in favor that you do not draw a six are 48/52.