Remember the formula for probability of an event:
How many multiples of ten are there from
to ? How many possible outcomes are there? ?
How many numbers are there from
to that are not ? Don't be surprised if your answer is not a fraction less than . ?
How many multiples of
are there from to ? ?
How many one-digit numbers are there from
Explore the problem with the eTool below.
Click the link at right for the full version of the eTool: 1-123 HW eTool (CPM)