SOLUTION: Out of 20 tickets 1 ticket is drawn at random so what is probability of getting multiple of 3 or 5

Algebra ->  Probability-and-statistics -> SOLUTION: Out of 20 tickets 1 ticket is drawn at random so what is probability of getting multiple of 3 or 5       Log On


   

Question 1073353: Out of 20 tickets 1 ticket is drawn at random so what is probability of getting multiple of 3 or 5
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Look at the outcomes that are multiples of 3 : {3,6,9,12,15,18}. There are 6 of them.
Look at the outcomes that are multiples of 5 : {5,10,15,20}. There are 4 of those.
Look at the outcomes that are both : {15}.
So out of 20 possible outcomes,
P=%286%2B4-1%29%2F20=9%2F20