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Introduction to probability

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Introduction to probability. What is probability? The likelihood of an event Occurring.

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Presentation Transcript
slide1

Introduction to

probability

slide2

What is probability?

The likelihood of an event Occurring

slide3

Suppose you have 4 nickels, 2 dimes, and 6 quarters in your pocket. If you draw a coin randomly from your pocket, what is the probability that: a. You will draw a nickel? b. You will draw a half-dollar? c. You will draw a quarter?

d. You will draw a silver coin?

slide4

Event – “drawing a specific coin”

    • Sample space – All possible out comes
    • P(E) = Number of favorable outcomes

Total Number of Outcomes

Ways to express probability

          • Fraction
          • Decimal
          • Percent
          • Odds
  • Theoretical Probability
slide5

You will draw a nickel?

  • P(nickel) =
  • b. You will draw a half-dollar?
  • P(half-dollar) =
  • c. You will draw a quarter?
  • P(quarter) =
  • You will draw a silver coin?
  • P(silver coin) =
slide6

Your group’s job is to conduct an experiment to determine the following:

  • What is the probability of drawing each
  • “different” item in the bag?
  • Rules:
  • NO ONE LOOKS INSIDE!!!
  • ONLY 1 item can be drawn out at a time.
  • The Item MUST be put back in the bag before another Item is drawn.
  • Create a system for recording your results.
slide7

NOW……

  • If I told you there are 40 chips in your bag….
  • Predict how many of each are in your bag
        • Red Chips
        • Blue Chips
        • Green chips
        • Purple chips
        • NOW COUNT!!!
slide9

Let the Good Times Roll!!

Pick a Partner.

Select which player will be ODD and which will be EVEN.

Each turn consists of rolling 2 dice.

One player rolls to find the product of the two dice.

If the product is the even, then the player who predicted even gets a point. If the product is the odd, then the player who predicted odd gets a point.

First player to 10 points WINS!!

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