Question 470200: A mini license plate for a toy car must consist of three numbers followed by a letter. Each number must be a 3,6, or 9. Each letter must be a T or R. Repetition of digits is NOT permitted.
Construct a tree diagram
List the sample space
exact probability of creating a mini license plate with a T. Give solution exactly in reduced fraction form
I don't know how to construct the tree diagram.
I have worked the problems as follows:
Sample space is:
369Y,396T,639T,693T,936T,963T AND the same for letter R
12 points so probability is 6/12=1/2
If you can offer help on tree diagram and advise if I have the proper answer.
Thanks!
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! The tree diagram will look like the following (of course, you may have it oriented a different way)
Sample space:
{369T,396T,639T,693T,936T,963T,369R,396R,639R,693R,936R,963R}
There are 6 plates with a T in them and there are 12 plates total. So probability is 6/12 = 1/2
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