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Year 7 Experimental Probability
Prispevano od: Dobson
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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 end up being

close to the

  Theoretical probability
 0
 1
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