Ann remembers the last four digits of a seven-digit telephone number but knows only that each of the first three digits is an odd number. Find the maximum number of telephone calls she must make before she dials the correct number when: a) the first three digits are different b) digits can be repeated.
Ann remembers the last four digits of a seven-digit telephone number but knows only that each of the first three digits is an odd number. Find the maximum number of telephone calls she must make before she dials the correct number when: a) the first three digits are different b) digits can be repeated.
Chapter9: Sequences, Probability And Counting Theory
Section9.5: Counting Principles
Problem 35SE: The set, S consists of 900,000000 whole numbers, each being the same number of digits long. How many...
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Ann remembers the last four digits of a seven-digit telephone number but knows only that each of the first three digits is an odd number. Find the maximum number of telephone calls she must make before she dials the correct number when:
a) the first three digits are different
b) digits can be repeated.
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