Numeracy Worksheet - Castlebrae Community High School - 2012 Page 45
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47FHS Numeracy
contents page
Probability
Expectation
=
P(event) x Number of trials
Example 5
If I were to roll a die 300 times. How many 5’s should I expect to get?
Level 4
P(5) = 1
6
Expected number of 5’s = 1 x 300
6
= 300
6
= 50
I should expect to roll a 5 fifty times.
45
L Watson 2012
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