Find the value of p from the table above. ii. Calculate the probability that at X is at least 5.  iii. Calculate the mean of the distribution

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The table below shows the probability distribution of the discrete random variable X.


           X                 2                 3            4               5                6                    7
           P(X=x)        p                2p           p              2p              3p                  p


i. Find the value of p from the table above.

ii. Calculate the probability that at X is at least 5. 
iii. Calculate the mean of the distribution. 

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