The Singing Hedgehog Guide to:
Probability 2 - Cards

With 4 suits each of 13 cards we generally get quarters and thirteenths.
Here are some probabilities relating to cards:

Chance of getting a red card26/52 = 1/2
Chance of getting a spade13/52 = 1/4
Chance of getting a picture card (J,Q,K,A)12/52 = 4/13
Chance of getting a four4/52 = 1/13
Chance of getting a red 72/52 = 1/26
Chance of getting a 5 of clubs1/52

These all change of course if a card is not replaced.
Chances are then out of 51; useful to remember that 51 is 3 x 17 so some cancelling may be possible
    
 
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