When calculating probability, we are comparing the number of favorable outcomes to the number of possible outcomes. To calculate the probability that a randomly chosen sock is blue we will use the Probability Formula.
P=Favorable Outcomes/Possible Outcomes
There are 30 cards labeled 1 to 30. We want to find the probability of pulling a card that is not 1 Since there are 30 cards, there are 30 possible outcomes. Out of these, the ones labeled 2 to 30 have a number that is not 1. There are 29 such cards, so there are 29 favorable outcomes.
P&=Favorable Outcomes/Possible Outcomes
&⇕
P(not 1)&=29/30
