a. How many integers are there from 10 through 99 b. How many odd integers are there

Chapter 9, Problem 16

(choose chapter or problem)

a. How many integers are there from 10 through 99?b. How many odd integers are there from 10 through 99?c. How many integers from 10 through 99 have distinct digits?d. How many odd integers from 10 through 99 have distinct digits?
e. What is the probability that a randomly chosen two-digit
integer has distinct digits? has distinct digits and is odd?

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