A box contains 10 fuses. Eight of them are rated at 10 amperes (A) and the other

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A box contains 10 fuses. Eight of them are rated at 10 amperes (A) and the other two are rated at 15 A. Two fuses are selected at random.
a. What is the probability that the first fuse is rated at 15 A?
b. What is the probability that the second fuse is rated at 15 A, given that the first fuse is rated at 10 A?
c. What is the probability that the second fuse is rated at 15 A, given that the first fuse is rated at 15 A?
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