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anonymous

  • 5 years ago

A card is chosen from a deck of cards, recorded, and then replaced. this is done 75 times and red card from 5 to 9 is chosen 21 times. a) what is the theoretical probability of a red card between 5 and 9 being chosen? b) how many times would you expect this event to happen in 75 trials? c) compare your answers to part a) and b)

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  1. anonymous
    • 5 years ago
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    so this is similar to the last one. you want to know how many possibilities there are that a given event happens (in this case red 5-9), and how many possibilities there are total. The first things you need to determine are: 1. how many red cards are there between 5 and 9? 2. how many total cards are in the deck?

  2. anonymous
    • 5 years ago
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    well how many red cards are there in a deck .. is it 26 >?

  3. anonymous
    • 5 years ago
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    right, so there are 5,6,7,8,9 of diamonds and hearts

  4. anonymous
    • 5 years ago
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    so 10 total that are red AND 5-9

  5. anonymous
    • 5 years ago
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    there are 52 cards in the deck total

  6. anonymous
    • 5 years ago
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    so the probability of a red card that is 5-9 = 10 (the number of red 5-9)/52 (total number of cards)

  7. bahrom7893
    • 5 years ago
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    yay I get it!

  8. anonymous
    • 5 years ago
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    how did you get 10?

  9. anonymous
    • 5 years ago
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    well, in a deck of cards, the red cards are diamonds and hearts

  10. anonymous
    • 5 years ago
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    so there are two sets of 5-9 that are red - hearts and diamonds

  11. anonymous
    • 5 years ago
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    iok

  12. anonymous
    • 5 years ago
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    so in total, there are 5,6,7,8,9 of hearts, and 5,6,7,8,9 of diamonds, so 10 total

  13. anonymous
    • 5 years ago
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    true

  14. anonymous
    • 5 years ago
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    so the probability = (possible red 5-9) divided by ( total possible cards)

  15. bahrom7893
    • 5 years ago
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    man i hate card problems.. how the heck would i know how many cards are there...I mean gambling is illegal in schols..

  16. bahrom7893
    • 5 years ago
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    *schools

  17. anonymous
    • 5 years ago
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    lol

  18. anonymous
    • 5 years ago
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    true - so (a) = 10/52

  19. anonymous
    • 5 years ago
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    so how do you think you get b?

  20. anonymous
    • 5 years ago
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    how do i rememeber all those red cards and everything?? coz itss hard :"S

  21. anonymous
    • 5 years ago
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    well, the good news is that a deck of cards is used across a LOT of probability questions

  22. anonymous
    • 5 years ago
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    is it lik 10/52 * 75 ?

  23. anonymous
    • 5 years ago
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    so you just gotta know - there are 52 cards, 4 suits, 2 suits of each color, 13 cards in each suit

  24. anonymous
    • 5 years ago
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    and yes, you are correct

  25. bahrom7893
    • 5 years ago
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    YAY!

  26. anonymous
    • 5 years ago
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    so good work =)

  27. anonymous
    • 5 years ago
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    whoz rigjht me???

  28. bahrom7893
    • 5 years ago
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    yup!

  29. anonymous
    • 5 years ago
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    boom!

  30. anonymous
    • 5 years ago
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    thats amazing :O

  31. anonymous
    • 5 years ago
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    it happens :p and it will happen more the more you practice

  32. bahrom7893
    • 5 years ago
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    and i still dont get it.. maybe im not tryin hard enough =/

  33. bahrom7893
    • 5 years ago
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    embarassin really, bein good in calc and when someone asks me a stat question i gtg.. sorry i dunno..

  34. anonymous
    • 5 years ago
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    haha, well if you asked me a calc question I'd give you a blank stare :p

  35. anonymous
    • 5 years ago
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    i got aniother questin too

  36. anonymous
    • 5 years ago
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    k, I'd say ask a different one on the left side

  37. anonymous
    • 5 years ago
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    and I'm sure many of us will make the jump

  38. anonymous
    • 5 years ago
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    ok make sure that uhelp me lol

  39. anonymous
    • 5 years ago
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    ur supposed to be asking another question

  40. bahrom7893
    • 5 years ago
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    shes tryin to do it on her own

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