don steward
mathematics teaching 10 ~ 16

Monday, 20 December 2010

2 consecutive heads

as k students to keep throwing a coin until they get two heads in a row
how many throws does it take to get two heads in a row?

do this several times

from the experimental data, possibly collected from the class, what is the average expected number of throws until you get 2 heads in a row?

the expected value is 6 and this theoretical value can be compared with the (average) of the experimental values obtained

how widely do the experimental values vary?

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