Probability of card shuffling homework

AI Thread Summary
The discussion revolves around calculating the probability of drawing four red cards from a shuffled deck, excluding JQK hearts and JQK diamonds. Participants debate whether to use the total number of red cards as 20 or 52, depending on the interpretation of the homework statement regarding the exclusion of certain cards. Clarification is sought on whether the excluded cards should be completely removed from the deck or simply not counted as red. The accuracy of the probability calculations hinges on this interpretation. Understanding the problem's wording is crucial for determining the correct approach to the probability tree.
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Homework Statement


A deck of cards is shuffled and a card is dealt. The remaining cards are shuffled and another card is dealt. The process is repeated until you have four cards dealt from the main pack. Use probability trees to determine the probability of obtaining:

four red cards (not including JQK hearts or JQK diamonds)?

Homework Equations





The Attempt at a Solution



For this would you put 20/46, 19/45, 18/44 and 17/43 or would you put the 20/52, 19/51, 18/50,17/49?
 
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Well, it depends on the question. By "(not including JQK hearts or JQK diamonds)", does it mean not to use them at all in the deck or they are used but just don't count as red cards.
 

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