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- Aug 26, 2007
- Messages
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For some reason I am really bad at these questions so thanks for the help.
Martha invited 4 friends to go with her to the movies. There are 120 different ways in which they can sit together in a row. In how many of those ways is martha sitting in the middle?
The answer is....
24 but i am not sure how to get it.
my next question is
how many 3-digit positive integers are odd and do not contain the digit "5"?
answer is...
288
Martha invited 4 friends to go with her to the movies. There are 120 different ways in which they can sit together in a row. In how many of those ways is martha sitting in the middle?
The answer is....
24 but i am not sure how to get it.
my next question is
how many 3-digit positive integers are odd and do not contain the digit "5"?
answer is...
288
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