Find the probability that the value of an item drawn at random from a normal distribution with mean 20 and standard deviation 10 will be between: (a) 10 and 15 (b) – 5 and 10, and (ii) 15 and 25. The relevant extract of the Area Table (under the normal curve is given below) : . 1.0 0.3413 0.5 1.5 0.4332 2.0 0.4772 2.5 0.4938 0.1915

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