## Amy876 3 years ago Erica was out of town for a month, so she had her friend Sara check her mailbox. Each day, Sara would count how many different types of mail Erica received and then place the mail in a box inside Erica's apartment. The table below shows how many pieces of each type of mail Erica received during the month. Erica's Mail Received in a Month Type of Mail Number of Pieces Bills20 Cards6 Junk Mail24 Magazines8 Advertisements38 Wrong Address 4 According to the table, if Erica drew two pieces of mail randomly from the box, without replacement, what is the probability she would draw out

1. Amy876

what is the probability she would draw out a wrong address

2. DoomDude

1/25 is the chance she will draw a wrong address, if she draws 4 times, that would be 1/25 times 4, that would equal 4/100

3. DoomDude

So if I am right, it would be 4/100 and that can be simplified to 1/25

4. Amy876

THats not one of the answers

5. DoomDude

oh, sorry then, It has been a while since I have done probability

6. DoomDude

let me go read up on it quick then get back here

7. Amy876

A 3/2475 B 3/2500 C 4/2475 D 1/625

8. kevinkeegan

(4/total)*(3/total-1)

9. kevinkeegan

1st time round prob= 4/total 2nd time, theres 1 less , so = 3/(total-1)

10. Amy876

I dont get it?

11. DoomDude

but wouldn't that equal 1/825?

12. Amy876

but thats not one of the answers

13. DoomDude

exactly

14. DoomDude

let me see....

15. DoomDude

let me try to get someone here that knows tis...

16. Amy876

its ok I have another question that i need help with too

17. DoomDude

post the one here while i try to get someone here

18. ZhangYan

it was C

19. kevinkeegan

working pls

20. DoomDude

could you explain it @ZhangYan