Experimental Probability and Complimentary Events

A store sells 28% of its DVD's to all people that come into the shop. What percentage of people do 28% 72% 128% 60% 42% of customers do not buy DVD's. 2000 people come into the store. What would you put into your calculator to find how many customers do not buy DVD's?
2000 ÷ 42% 42% × 2000
2000 ÷ 58% 58% × 2000 I tossed a dice 20 times and got the following results. What is my experimental probability of getting a six on my next roll? 1 2 3 4 5 6 I spun a spinner and found the following results. What is the experimental probability of my next spin landing on red? red 5 blue 6 = green 5 red 4 The probability of my spinner landing on blue is 1/5. If I spin the spinner 200 times, how many times would I guess it would land on blue? 4/5 × 200 = 160 200 1/5 × 200 = 40 Sarah is counting cars go by and looks at the colours of the cars. Below is the table of her results.
How many cars did Sarah see? blue 6 white 20 White and Blue 104 94 red 24 green 26 black 18 Sarah is counting cars go by and looks at the colours of the cars. Below is the table of her results. What is the probability that Sarah will see a blue car next? blue 6 white 20 6/94 (not reduced) 6/95 104/200 red 24 green 26 black 18 Sarah is counting cars go by and looks at the colours of the cars. Below is the table of her results. What is the probability that Sarah will see a white car next? blue 6 white 20 10/47 (reduced) 20/95 20/200 red 24 green 26 black 18 If an experiment goes on for a long time, the experimental probability often ends up being close to the Theoretical probability reindeer 1 To find the compliment of an event in probability you just State the same thing State the opposite of the event State how pretty it is The compliment of tossing a die and getting a 4 is: Tossing a die and getting a 1,2,3,5 or 6 Tossing a die and getting a 3 Tossing a die and losing Another way of stating the compliment of tossing a die and getting a 4 is: Tossing a die and not getting a four Tossing a die and getting a 1 Tossing a die and winning The compliment of a horse winning a race is The horse not winning the race The horse coming in second The horse turning into a chicken |

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