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If the result of a test were normally distributed with a mean of 70 and a standard deviation of 10, what would the area below the probability density

If the result of a test were normally distributed with a mean of 70 and a standard deviation of 10, what would the area below the probability density function of 90 between 100?

or:If the result of a test were normally distributed with a mean of 70 and a standard deviation of 10, what would the area below the probability density function of 90 between 100?

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