## anonymous one year ago what is the probability of spinning doubles with a spinner of 3 and a spinner of 6 numbered 1-3 and 1-6?

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1. anonymous

|dw:1434422377136:dw|

2. xapproachesinfinity

a spiner has 0 to 9?

3. xapproachesinfinity

oh ok

4. anonymous

I don't know if i typed the question to make sense

5. xapproachesinfinity

is the question as it is written or you change it?

6. xapproachesinfinity

well let's P((1,3) and (1,6) this the desired prob

7. xapproachesinfinity

P((1,3) and (1,6))=P((1,3))P((1,6))

8. anonymous

So it gives me the spinners i drew and it gives me a Chart |dw:1434422759820:dw|

9. xapproachesinfinity

now we find p((1,3)) we need to all the possible pairs here

10. xapproachesinfinity

11. anonymous

and it just asks what is the probability of spinning double threes

12. xapproachesinfinity

i would do it this way (1,1)(1,2)(1,3)(1,4)(1,5)(1,6) (2,1)(2,2)(2,3)(2,4)(2,5)(2,6) (3,1)(3,2) (3,3)(3,4)(3,5)(3,6) and go on out of this how many are (1,3) i think (3,1) is different

13. xapproachesinfinity

same go with (1,6)

14. xapproachesinfinity

or does it matter from which spinner gives 1 or 3?

15. xapproachesinfinity

if that matter we need to narrow that list down

16. anonymous

Nope it doesn't matter. Thank you! Ill do that!

17. xapproachesinfinity

just to clear one misundertanding i said P(1.3 and 1,6) that is not the case they are asking for two probabs p(1,3) p(1,6) two distinct questions

18. xapproachesinfinity

well i think it is clear now :)

19. kropot72

The probability of spinning a 1 on the spinner of 3 is 1/3. The probability of spinning a 1 on the spinner of 6 is 1/6. Therefore the probability of a double 1 is given by $\large \frac{1}{3} \times \frac{1}{6}$. The probability of a double 2 will be the same as for a double 1, and the probability of a double 3 will also be the same as the probability of a double 1. The events 'double 1', 'double 2' and 'double 3' are mutually exclusive, therefore the probability of spinning doubles is given by $\large P(doubles)=3\times\frac{1}{3}\times\frac{1}{6}$