An archer can either hit or miss his target. The probability of hitting a target is 60.0% . Suppose, he will take 19 attempts on a specific day. a. What is the mean number of attempts in which he hits the targets? Answer in exact fraction, or rounded to at least 2 decimal places. b. What is the standard deviation in the number of successful attempts? Answer in exact fraction, or rounded to at least 2 decimal places.

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