Problem:

The IQ of adults in a certain large population is normally distributed with mean 100 and standard deviation10. If a person is chosen at random form this group. the probability that the person's IQ is less than 85 or greater than 110 is:

a. 0.7745.

b. 0.9081.

c. 0.2255.

d. 0.0919.

e. none of the above

The IQ of adults in a certain large population is normally distributed with mean 100 and standard deviation10. If a person is chosen at random form this group. the probability that the person's IQ is less than 85 or greater than 110 is:

a. 0.7745.

b. 0.9081.

c. 0.2255.

d. 0.0919.

e. none of the above

## This question was asked on Apr 28, 2010.

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