Probability
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A card is drawb at random from a pack of 52 playing cards. Find the probability that the card drawn is a queen or a spade.
my answer's is 4/13, same as that of my teacher's. the answer booklet writes 15/52. Which is the correct answer?
thanks.
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Seriously you can either just open a deck of cards and see or just use your imagination you know....
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4/13
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Like the chiobu 16/f/lonely said, can take out a deck of cards, take out all the Queens and Spades, then count them.
How many do you have?
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Originally posted by maurizio13:
Like the chiobu 16/f/lonely said, can take out a deck of cards, take out all the Queens and Spades, then count them.
How many do you have?
Flatter me sia... -
Originally posted by 16/f/lonely:
Flatter me sia...Seriously, you are being modest, you are one of the prettiest girl in sgForums.
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16/52 which is 4/13
the 16 cards which satisfy are the 13 spades and the queen of hearts, clubs and diamonds.
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Like that were got shiok?
Why not calculate the odds of getting a royal flush, a straight flush, 4 of a kind or a full house from a poker game?
You can get the odds of the above easily from googling the internet, but if you want to challenge yourself, try working it out with a pen, paper and calculator.
Not challenging enough? Try contingent probabilities like what is the odds of getting a royal flush given another player has already a full house of 3 Queens and 2 10's in a poker game involving 5 players.
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Originally posted by charlize:
Like that were got shiok?
Why not calculate the odds of getting a royal flush, a straight flush, 4 of a kind or a full house from a poker game?
You can get the odds of the above easily from googling the internet, but if you want to challenge yourself, try working it out with a pen, paper and calculator.
Not challenging enough? Try contingent probabilities like what is the odds of getting a royal flush given another player has already a full house of 3 Queens and 2 10's in a poker game involving 5 players.
You still visit the casinos so often?
I thought your spate on the roulette wheel didn't end up to your expectancy.
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I think probability should not be taught in schools, it teaches kids about gambling.
Before you know it, there will be class excursions to casinos.
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What about the probability of two different players from four getting one four-of-a-kind each? happened to me once while playing dai-dee
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See what I mean!
Probability is about gambling.
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Everybody knows the casino always has the edge.
Gamblers can calculate all the odds they want, they will still lose on the long run.
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funny as it sounds, there's also a probability that the answer booklet is wrong, and in my opinion, its a very high probability. >.<
The answer should be 4/13, (13 spades plus 3 queens of the other groups / 52 cards).
I remember when i was back in sec sch, the answer booklet always had errors lol.
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Originally posted by jayh272416:
What about the probability of two different players from four getting one four-of-a-kind each? happened to me once while playing dai-dee
Offhand without any calculation, the odds of 2 persons getting four of a kind each is reasonably high given that each players has got 13 cards each in dai dee.
Really.
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Originally posted by charlize:
Everybody knows the casino always has the edge.
Gamblers can calculate all the odds they want, they will still lose on the long run.
Having the edge?
That depends if the gambler has deeper pockets than the casino.
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Originally posted by dj woody:
funny as it sounds, there's also a probability that the answer booklet is wrong, and in my opinion, its a very high probability. >.<
The answer should be 4/13, (13 spades plus 3 queens of the other groups / 52 cards).
I remember when i was back in sec sch, the answer booklet always had errors lol.
Maybe it's a trick question.
Sometimes there are 2 jokers in the pack of cards.
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Originally posted by maurizio13:
Having the edge?
That depends if the gambler has deeper pockets than the casino.
You refering to martingale systems?
If the gambler has got deeper pockets than the casino, why not just buy over the casino?
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Originally posted by charlize:
You refering to martingale systems?
If the gambler has got deeper pockets than the casino, why not just buy over the casino?
darn it charlize!!!
don't confuse me!!!
wait i go google martingale.
makes no sense for a gambler to win his own money, ie if he buys over the casino.
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Originally posted by maurizio13:
darn it charlize!!!
don't confuse me!!!
wait i go google martingale.
makes no sense for a gambler to win his own money, ie if he buys over the casino.
CB, don't tell me you don't know martingale and anti martingale systems.
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Originally posted by charlize:
CB, don't tell me you don't know martingale and anti martingale systems.
Seriously, I don't.
I think my classmate and I were gambling with toss of coin in Primary 6 (in class), he tried to use this system, the initial loss of afew dollars skyrocketed to a couple of tens in the next 5-6 throws. I was hoping that he win it back because I don't know how to collect so much money from him. Finally he won it back.
Of course for it to work, there must be no limits on bets.
Originally, martingale referred to a class of betting strategies popular in 18th-century France. The simplest of these strategies was designed for a game in which the gambler wins his stake if a coin comes up heads and loses it if the coin comes up tails. The strategy had the gambler double his bet after every loss, so that the first win would recover all previous losses plus win a profit equal to the original stake. Since a gambler with infinite wealth will with probability 1 eventually flip heads, the Martingale betting strategy was seen as a sure thing by those who practised it. Of course, none of these practitioners in fact possessed infinite wealth, and the exponential growth of the bets would eventually bankrupt those who choose to use the Martingale. Moreover, it has become impossible to implement in modern casinos, due to the betting limit at the tables. Because the betting limits reduce the casino's short term variance, the Martingale system itself does not pose a threat to the casino, and many will encourage its use, knowing that they have the house advantage no matter when or how much is wagered.
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charlize know so much, must be a quaint quant.
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Originally posted by maurizio13:
charlize know so much, must be a quaint quant.
Google is your friend.
Really.
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Originally posted by charlize:
Google is your friend.
Really.
So out of the blue you just search Martingale?
What is the probability of that happening?