SOLUTION: a) how many 3-digit numbers can be formed using only 2,3,5,6,7 and 9 with no repeats? b)how many of these numbers are less than 400?even?odd?multiple of5?

Question 1062501: a) how many 3-digit numbers can be formed using only 2,3,5,6,7 and 9 with no repeats?
b)how many of these numbers are less than 400?even?odd?multiple of5?

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
a) how many 3-digit numbers can be formed using only 2,3,5,6,7 and 9 with no repeats?
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The 1st # is 1 of 6.
Then 1 of 5, then 1 of 4
--> 6*5*4 = 120
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b)how many of these numbers are less than 400?
Same as above, except the 1st # is 2 or 3, --> 1 of 2
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even?
Similar to above
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odd?
multiple of 5?

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