A mini license plate for a toy car must consist of a one digit odd number followed by two letters. Each letter must be a J or K. Repetition of letters is permitted.
Use the counting principle to determine the number of points in the sample space.
Construct a tree diagram to represent this.
List the sample space.
Determine the exact probability of creating a mini license plate with a J. Give solution exactly in reduced fraction form.

Question

anonymous · Answer

one odd digit number presumably means 
1,3,5, 7, 9
after that is j or k.  so it can be jj, kj, kk, jk 
therefore by the "counting principle" you have 5 times 4 = 20 possibilities

anonymous · Answer

Then from the tree diagram the last parts answer would be 15/20=3/4 (J)

anonymous · Answer

Thanks

anonymous · Answer

yes three - fourths have a j