Probability

Lessons

• Introduction
  a)

  Introduction to Probability

  • What is probability?
  • How to write probability as a fraction, decimal, and percent?
  • How to draw a tree diagram?
  
  
  b)

  Introduction to statistics:
  • What is mean?
  • What is median?
  • What is an outlier?
  • What is mode?
  • What is range?
  
  
  
  c)

  What is a two-way frequency table?
  
  
  d)

  How to read a two-way frequency table?
  
  

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• 1.
  The following is the money raised in a school fund raising activity by each class in grade 9: $1 000, $580, $810, $1 050, $840 and $600. What is the mean, median and mode amount of money raised by these six classes?

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• 2.
  Six hundred people were randomly selected in downtown. They were asked if they choose their clothes based on its comfort or style. The following is the results:
  

  	Comfort	Style	Total
  Male	172	133	305
  Female	115	180	295
  Both	287	313	600

  a)

  What is the probability that a person in the survey is a female?
  
  
  b)

  What is the probability that a person chooses comfort over style?
  
  
  c)

  What is the probability that a male chooses style over comfort?
  
  
  d)

  Was there any assumption made in this survey?
  
  

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