Question: What is the probability that a four-digit integer with no beginning zeros: a. Has 3, 5, or 7 as a digit? b. Begins with 3,

What is the probability that a four-digit integer with no beginning zeros:

a. Has 3, 5, or 7 as a digit?

b. Begins with 3, ends with 5, or has 7 as a digit?

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