Question: Given that a normal variable has a mean of 10 and a variance of 25, calculate the probability that a member chosen at random is:

Given that a normal variable has a mean of 10 and a variance of 25, calculate the probability that a member chosen at random is: 

(a) ≥ 11, 

(b) ≤ 11, 

(c) ≤ 5, 

(d) ≥ 5, 

(e) between 5 and 11.

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