The amounts a soft drink machine is designed to dispense for each drink are normally  distributed, with a mean of

12.4 fluid ounces and a standard deviation of 0.3 fluid ounce. A drink is randomly selected.

(a) Find the probability that the drink is less than 12.2 fluid ounces.

(b) Find the probability that the drink is between 12 and 12.2 fluid ounces.

(c) Find the probability that the drink is more than 12.9 fluid ounces. Can this be considered an unusualevent? Explain your reasoning.

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