Exercise 30 (Section 3.3) gave the pmf of Y, the number of traffic citations for a randomly

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Exercise 30 (Section 3.3) gave the pmf of Y, the number of traffic citations for a randomly selected individual insured by a particular company. What is the probability that among 15 randomly chosen such individuals
a. At least 10 have no citations?
b. Fewer than half have at least one citation?
c. The number that have at least one citation is between 5 and 10, inclusive?*
* "Between a and b, inclusive" is equivalent to (a ‰¤ X ‰¤ b).
In Exercise 30
An individual who has automobile insurance from a certain company is randomly selected. Let Y be the number of moving violations for which the individual was cited during the last 3 years. The pmf of Y is
Exercise 30 (Section 3.3) gave the pmf of Y, the
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