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How many strings of three decimal digits (0, 1, 2, …, 9)
a) do not contain the same digit three times?
b) begin with an odd digit?
 10 months ago
 10 months ago
How many strings of three decimal digits (0, 1, 2, …, 9) a) do not contain the same digit three times? b) begin with an odd digit?
 10 months ago
 10 months ago

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tcarroll010Best ResponseYou've already chosen the best response.3
Consider that there are 10 x 10 x 10 total strings of 3digit numbers (if you allow leading 0's) There are only 10 where all digits are the same (all 0's through all 9's) So, you have: 10 x 10 x 10  10 strings where you don't have 3 identical digits. As for your second question, there are: 5 x 10 x 10 that start with an odd digit which happens to be the same as the number that start with an even digit.
 10 months ago

tcarroll010Best ResponseYou've already chosen the best response.3
All good now, @sweetshiva9963 ?
 10 months ago

tcarroll010Best ResponseYou've already chosen the best response.3
Ok! Glad I was able to help you! @sweetshiva9963
 10 months ago

tcarroll010Best ResponseYou've already chosen the best response.3
Good luck to you in all of your studies and thx for the recognition! @sweetshiva9963
 10 months ago

sweetshiva9963Best ResponseYou've already chosen the best response.0
your welcome. Thanks for the help
 10 months ago
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