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Using Probability to Estimate IQ

The IQ of children in a certain population is normally distributed with mean 100 and standard deviation 10. If a child is randomly chosen from this group, the probability that the child's IQ is less than 85 or greater than 110 is?
a. .0919
b. .2255
c. .9081
d. .7745

Solution Summary

This solution gives a step-by-step process of how to determine the probability of selecting a child with an IQ greater than 110 or less than 85.