Here's the question you clicked on:
Amy876
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
what is the probability she would draw out a wrong address
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
So if I am right, it would be 4/100 and that can be simplified to 1/25
THats not one of the answers
oh, sorry then, It has been a while since I have done probability
let me go read up on it quick then get back here
A 3/2475 B 3/2500 C 4/2475 D 1/625
(4/total)*(3/total-1)
1st time round prob= 4/total 2nd time, theres 1 less , so = 3/(total-1)
but wouldn't that equal 1/825?
but thats not one of the answers
let me try to get someone here that knows tis...
its ok I have another question that i need help with too
post the one here while i try to get someone here
could you explain it @ZhangYan