Margaret is playing a game with a standard deck of 52 cards which contains 4 jacks. The first player to select a jack gets to start the game. What is the theoretical probability that Margaret, when choosing first, will choose a jack?

There are 4 jacks among 52 cards, so the probability of selecting a jack is 4/52. Simplifying by dividing the numerator and denominator by 4 gives 1/13. Therefore, the correct choice is 1 over 13.

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