From a deck of 52 playing cards one card is chosen. What is the probability of choosing a 7 or a jack.  

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justaguide | College Teacher | (Level 2) Distinguished Educator

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A card is chosen from a deck of 52 playing cards. The probability of choosing either a 7 or a jack has to be determined. This is quite easy to do. There are 4 cards with the number 7 and 4 cards that have a jack.

The total number of options available when picking the card is 52. The number of favorable options is 4 + 4 = 8.

The required probability is the number of favorable options divided by the total number of options. This is equal to 8/52 = 2/13

The probability of choosing a 7 or a jack is 2/13.

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