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In a Normal distribution with mean of 140, if its 80th percentile is the value 160, what is the value that corresponds to its 20th

In a Normal distribution with mean of 140, if its 80th percentile is the value 160, what is the value that corresponds to its 20th percentile?

a. 160.

b .20.

c. 80.

d. 120.

need help with the working and solution.

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