The birth registry in a hospital collects information from the mother and within this it collects the mother's weight gain during pregnancy (in pounds). According to the data obtained for 2010, the mothers' weight gain during that year had a normal distribution with a mean of 30.23 pounds and a standard deviation of 13.84 pounds. If a mother is randomly selected from this population, what is the probability that during her pregnancy she gained between 10 and 20 pounds in weight?   This question requires demonstrating the procedure A. 0.1357 B. 0.71 C. 0.2389 D. 0.6401 E. 0.1575

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