math 157

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Consider the experiment of selecting a card from an ordinary deck of 52 playing cards and determine the probibility of the stated event.

A. A nonface card or a 7 is drawn

B. A card that is not a king and not a spade is drawn.

For A a nonface card is 10/13 and for a 7 it is 1/13.

but I do not know how to start with the second one.

  • math 157 -

    Probability is the good / total.
    A. How many non-face or 7 cards are there? Divide it by 52. Be careful, a 7 is a non-face card.

    B. How many cards are not Kings and not Spades? There are 13 Spades and 4 Kings, but 1 of those Kings is the King of Spades.

  • math 157 -

    A. Ok there are 40 non-face cards and 4 seven cards, what do you mean do I add them and then divide by 52?

    B. I think the answer is 4/13, is that right?

  • math 157 -

    A. Are the 4 seven cards included in the 40 non-face cards?

    B. correct

  • math 157 -

    A. yes there are 4 seven cards included in the 40 non-face cards, what does that mean do I divide 40 by 52?

  • math 157 -

    Yes, 40/52.

  • math 157 -

    Ok so then,
    A. would be 10/13

    B. would be 4/13

    RIGHT?? :-)

  • math 157 -

    Both are correct.

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