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A typical adult has an average IQ score of 105 with a standard deviation of 20. 

If twenty (20) randomly selected adults are given an IQ test:

What is the probability that the sample mean scores will be between 85 and 125 points?

Find the probability that P(85 <= X =< 125)   which is equal to   P(X <= 125) - P(X <=  85)

Enter answer to 2 decimal precision.

Do not enter answer as a percent.

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