Posted by **Carrie** on Sunday, March 7, 2010 at 12:59am.

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**, Sunday, March 7, 2010 at 1:02am
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**, Sunday, March 7, 2010 at 7:43am
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**, Sunday, March 7, 2010 at 8:50am
Ok. I counted some numbers twice. I needed to write the numbers out like you did. Thanks

## Answer this Question

## Related Questions

- statistics - A spinner has equal regions numbered 1 through 21. What is the ...
- PROBABILITY MATH - a spinner has regions numbered through 1-21 what is the ...
- Algebra 2 - There are two spinners. Each spinner is numbered 1-4. Each spinner ...
- Pre-Algebra (Probability) - The theoretical probability of spinning an even ...
- mathematics Probability - A simple 5_sided spinner is numbered 1,2,3,4,5.On ...
- math - A spinner is divided into 5 equal sections numbered 1, 2, 3, 4, and 5. If...
- Math - Probability - A spinner is divided into 11 equal sections numbered from ...
- algebra - An experiment consists of spinning a spinner. The odds in favor of the...
- ALgebra - A spinner has five regions numbered 1 through 5. If the spinner is ...
- Math - A spinner is divided into 12 equal segment that are numbered 1 through 12...

More Related Questions