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Theoretical probability
CS
by
Charlotte Savage
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Updated Aug 21, 2021
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Chapters
00:00
Chapter 1
00:05
Chapter 2
00:16
Theoretical probability
00:32
Experimental Probability
00:57
Chapter 5
Audio Transcript
Auto-generated
00:00 - 00:02
Now let's have a look at the probability when rolling
00:03 - 00:05
a di a di has six sides with each side
00:05 - 00:07
having the same likelihood of being rolled.
00:08 - 00:10
This means whether you roll a six or a one,
00:10 - 00:12
they have an even chance of landing on each number.
00:13 - 00:14
Even though the value of the number may be greater
00:15 - 00:19
or smaller, the six different outcomes on the die mean
00:19 - 00:21
there is a one in six chance of rolling each
00:21 - 00:25
number. This is our theoretical probability which can be shown
00:25 - 00:26
as a fraction 1/6.
00:27 - 00:30
If we look at all the possible outcomes we can
00:30 - 00:32
see they all have an even chance of being rolled.
00:33 - 00:37
But when we look at our experimental probability we might
00:37 - 00:38
get a different outcome.
00:39 - 00:42
This is because the results aren't affected by each other
00:42 - 00:44
even though we have rolled a number already.
00:45 - 00:47
We could roll the same number straight after.
00:48 - 00:50
So will we ever reach our theoretical probability?
00:51 - 00:52
The answer is yes.
00:52 - 00:54
The more times you roll the die, the closer we
00:54 - 00:55
get to our theoretical probability.
00:57 - 00:58
So what would happen if we have two dice?
00:59 - 01:00
How many outcomes would there be?
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