(a) How many even numbers less than 500 can be formed using the digits 1, 2, 3, 4 and 5? Each digit may be used only once in any number. te [4]
(a) How many even numbers less than 500 can be formed using the digits 1, 2, 3, 4 and 5? Each digit may be used only once in any number. te [4]
Chapter9: Sequences, Probability And Counting Theory
Section9.4: Series And Their Notations
Problem 53SE: How many terms must be added before the series 1357.... has a sum less than -75?
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I don't get why for 2 digit even numbers there can be 8 possibilities and for 3 digit even numbers there can be 18. Someone explain please.
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