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Browse High School Probability
Stars indicate particularly interesting answers or
good places to begin browsing.
Selected answers to common questions:
Coin tossing.
Odds vs. probability.
Poker probabilities.
Rolling dice.
 Why Do We Multiply the Probabilities of Independent Events? [10/15/2009]

We learned the probability formula P(A and B) = P(A) x P(B). Why do we
multiply the two probabilities rather than adding them?
 Why Learn about Probability and Statistics? [04/17/2002]

Why is probability so important to learn? When will we use it in the
real world?
 Why Study Sequences and Series? [02/26/1999]

What are some applications of arithmetic sequences and series?
 Winning the Game [09/21/2000]

In an equitable game of coin tossing, I have x dollars and my friend has
y dollars... What is the probability that my friend will win all of my x
dollars before I can win his y dollars?
 Winning the Lottery [01/30/1997]

Can you find a formula that predicts the outcome of the lottery?
 Working Out Betting Odds [06/27/2001]

I am doing a horse racing night in a local pub, and as part of the
committee I have been asked to try to find out how to work out the
betting odds for each horse...
 The World Series [10/22/2000]

What is the probability of the Yankees and the Mets playing each other in
the World Series?
 Yahtzee Probabilities and a State Matrix [12/30/1998]

In Yahtzee, what are the odds of rolling 5 of a kind within 3 rolls of
the dice? What if you reroll all 5 dice each time? Does this involve
transition matrices?
 Years That Start on Sunday [10/02/2000]

What is the probability that a randomly chosen year will start on a
Sunday?
 Zero Probability vs. Practically Improbable [02/09/2014]

An adult has doubts that rare events remain possible, however unlikely. With
examples that build off his own, as well as one drawn from a common stockpicking
fraud, Doctor George shows how much practical considerations bias our grasp of
probability.
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