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IQ scores are Normally distributed with mean 100 and standard deviation 15. Please show working 1-...

IQ scores are Normally distributed with mean 100 and standard deviation 15. Please show working

1- Find the probability that an IQ result is between 75 and 95.

2- Find the probability of having an IQ greater than 120.

3- how high would you IQ have to be to be in the top 2% of all IQ results.

Math   Statistics-And-Probability   
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