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    Probability of Finger Ridge Counts

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    In the study of fingerprints, an important quantitative characteristic is the total ridge count for the 10 fingers of the individual. Suppose that the total ridge counts of individuals in a certain population are approximately normally distributed with a mean of 140 and a standard deviation of 50.

    Find the probability that an individual picked at random from this population will have a ridge count of 200 or more.

    In a population of 10,000 people how many would you expect to have a ridge count of 200 or more?

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    https://brainmass.com/statistics/probability/probability-finger-ridge-counts-22325

    Solution Preview

    a) Denote the total ridge counts of individuals in a certain population by X. Then X is a random variable and approximately normally distributed with a mean of 140 and a standard deviation of 50, namely, ...

    Solution Summary

    In about 135 words, this solution provides a step by step explanation of how to approach this mathematical-based problem which requires the formulation of equations to solve for the ridge count in a specific population. All calculations are provided.

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