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Mathematics 7 Online
OpenStudy (anonymous):

a die is rolled 9 times and the number of times that 2 shows on the upper face is counted. if this experiment is repeated many times, find the mean for the number of twos.

OpenStudy (geometry_hater):

mean = (number of trials)*(probability of getting a 2)

OpenStudy (geometry_hater):

i dont think its possible to answer the question without knowing how many times the dice was flipped vs the number of times it landed on 2

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