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McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

6. Probabilities of Mutually Exclusive Events

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Exercise 24 Page 930

Use the Probability Formula.

1/2 or 50 %

Practice makes perfect

When calculating the experimental probability, we are comparing the number of times the event occurs to the number of times the experiment is done. P=Times the Event Occurs/Times the Experiment Is DoneThis is very similar to the Probability Formula. In a standard deck of cards, there are 52 cards. This is also the number of times the experiment is done.

Out of 52 cards, 26 cards are red, which is the number of times the event occurs. Now, we have enough information to calculate P(Red).

P=Times the Event Occurs/Times the Experiment Is Done

SubstituteValues

Substitute values

P(Red)=26/52

a/b=.a /26./.b /26.

P(Red)=1/2

▼

Convert to percent

Calculate quotient

P(Red)=0.5

Convert to percent

P(Red)=50 %

The probability of choosing a red card is equal to 12, which can also be written as 50 %.

Subchapter links

Exercises p.929-931