Posted by Carrie on .
A spinner has regions numbered 1 through 21. What is the probability that the spinner will stop on an even number or a multiple of 3?
Okay so I am lost. I understand that the probability of an event is
the # of ways an event can occur over the total # of possible outcomes.
I need some explaining done. Please

Math 
Carrie,
Would the total possible outcomes be 17?
The number of evens would be 10 and the multiply of 3 is 7. So 10 and 7 together is 10. 
Math 
Reiny,
List the numbers from 1 to 21 which are either even or multiples of 3:
2,3,4,6,8,9,10,12,14,15,16,18,20,12
I count 14, not 17.
Prob(event as stated) = 14/21 = 2/3 
Math 
Carrie,
Ok. I counted some numbers twice. I needed to write the numbers out like you did. Thanks