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Moha A.

asked • 08/02/19

percentage of population and probability of coin toss

hello there,


I would to help me how to solve these two problems.

1- Assume the world human population heights follow a perfect normal distribution with standard deviation of 20 and mean of 150, what percentage of the population would have a height between 130 and 170?


2- Having a fair coin i.e. P(Head) = P(Tail) = 0.5, what is the probability of getting a sequence of 3 consecutive tails?


thank you in advance

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