Question

I am confused about parts C and D. 

How many three-digit numbers are possible under each condition?
(a) The leading digit cannot be zero.
900
numbers
(b) The leading digit cannot be zero and no repetition of digits is allowed.
numbers
648
(c) The leading digit cannot be zero and the number must be a multiple of 2
125
numbers
(d) The number is at least 500.
numbers
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Transcribed Image Text

How many three-digit numbers are possible under each condition? (a) The leading digit cannot be zero. 900 numbers (b) The leading digit cannot be zero and no repetition of digits is allowed. numbers 648 (c) The leading digit cannot be zero and the number must be a multiple of 2 125 numbers (d) The number is at least 500. numbers

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