# Thread: Probability Word Problem homework help

1. ## Probability Word Problem homework help

A group of students was recently polled about the technology they own.

69 own a cell phone
45 own a computer
23 own an ipod
4 do not own any of the above three items
34 own a cell phone but not a computer nor an ipod
6 own all three, a computer, an iPod, and a cell phone
8 own a cell phone and an ipod but not a computer
2 own only an ipod

a.) How many students were polled?

b.) What is the probability a randomly selected polled student owns a computer?

c.) What is the probability a computer owner also owns an iPod?

d.) What is the probability a randomly selected polled student owns an iPod or a cell phone?

e.) What is the probability a randomly selected polled student owns an ipod and a cell phone?

2. ## Re: Probability Word Problem homework help

A Venn diagram will be very helpful to solve this. Have you tried drawing one?

I'll try

4. ## Re: Probability Word Problem homework help

Once you do, post your answer to part a) and I will tell you if it agrees with what I got.

5. ## Re: Probability Word Problem homework help

i got 89 for a.)

6. ## Re: Probability Word Problem homework help

I got 45/89 for b.)

7. ## Re: Probability Word Problem homework help

I get a different number for part a). Can you post your diagram?

edit: Did you leave out those who do not own any of the 3?

8. ## Re: Probability Word Problem homework help

Yes so is 93?

9. ## Re: Probability Word Problem homework help

Yes, that's what I have.

10. ## Re: Probability Word Problem homework help

I got 13/93 for c
78/93 for d
8/93 for e

Is that what you got??

11. ## Re: Probability Word Problem homework help

c) no

d) yes, but reduce the fraction.

e) no

12. ## Re: Probability Word Problem homework help

C) 7/93
E) How is it not 8/93? It asks us the probability that a student owns an iPod and a cell phone, and the example tells us that 8 owns a cellphone and an ipod??????

13. ## Re: Probability Word Problem homework help

c) No. You know there are 45 computer owners, so the denominator will be 45.

e) You are neglecting those who own all 3.

14. ## Re: Probability Word Problem homework help

Right, but there are 6 others that have all three. They qualify don't they?

ok