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By: Mr. Dunkleberger Mechanicsville Elementary School

Probability. By: Mr. Dunkleberger Mechanicsville Elementary School. Introduction to Probability. Problem:   A spinner has 4 equal sectors colored yellow, blue, green and red. What are the chances of landing on blue after spinning the spinner? What are the chances of landing on red?.

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By: Mr. Dunkleberger Mechanicsville Elementary School

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  1. Probability By: Mr. Dunkleberger Mechanicsville Elementary School

  2. Introduction to Probability Problem:   • A spinner has 4 equal sectors colored yellow, blue, green and red. What are the chances of landing on blue after spinning the spinner? What are the chances of landing on red?

  3. Introduction to Probability Solution:   • The chances of landing on blue are 1 in 4, or one fourth.   • The chances of landing on red are 1 in 4, or one fourth.

  4. Vocabulary • An experiment is a situation involving chance or probability that leads to results called outcomes. • In the problem above, the experiment is spinning the spinner.

  5. Vocabulary • An outcome is the result of a single trial of an experiment • The possible outcomes are landing on yellow, blue, green or red.

  6. Vocabulary • An event is one or more outcomes of an experiment. • One event of this experiment is landing on blue.

  7. Vocabulary • Probability is the measure of how likely an event is. • The probability of landing on blue is one fourth.

  8. Probability of an Event The Number Of Ways Event A Can Occur   The Total Number Of Possible Outcomes P(A)=

  9. Let’s Experiment • The following slides contain online experiments with probability http://www.mathsonline.co.uk/nonmembers/resource/prob/

  10. Let’s Flip a Coin • Click on the coin to experiment with the probability of coins

  11. Spin the Spinner • Click on the spinner to experiment with the probability of spinners

  12. Santa’s Sack • Click on Santa’s picture to experiment with what is inside his bag of gifts

  13. Roll the Dice • Click on the picture of the dice to experiment with the probability of sums on the dice

  14. Quiz Time 1. Which of the following is an experiment? • Tossing a coin. • Rolling a single 6-sided die. • Choosing a marble from a jar. • All of the above

  15. Quiz Time 2. Which of the following is an outcome? • Rolling a pair of dice. • Landing on red. • Choosing 2 marbles from a jar. • None of the above.

  16. Quiz Time 3. Which of the following experiments does NOT have equally likely outcomes? • Choose a number at random from 1 to 7. • Toss a coin. • Choose a letter at random from the word SCHOOL. • None of the above.

  17. Quiz Time 4. What is the probability of choosing a vowel from the alphabet? a) 21/26 b) 5/26 c) 1/21 d) None of the above.

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