A bag contains 28 marbles: 9 black, 14 red, and 5 blue. A marble is drawn from the bag at random.
1 answer:
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I'm going to rewrite the equation assuming this is the correct form:
For 
to be continuous at 
, we need to have
Note that
means that 
, but that 
is *approaching* 5. We're told that for , we have
We can write
and the limit would be
and so is discontinuous.
Note that
We can write
and the limit would be
and so