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OpenStudy (anonymous):
how many numbers are between 300 and 800 can be made by using digits 2,4,5,6,0?
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OpenStudy (callisto):
The first digit can't be 0 or 2, so you have 3 digits for the first choice The second digit can only be any of the remaining digits, so you have again, 4 choices The third digit can be any of the remaining digits, that means you have 3 choices Total numbers you can form = # of first choice * # of second choice * # of third choice PS: # = number of
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