A bag contains 21 colored blocks.
6 of them are black
5 of them are green, and
10 are red
You randomly draw 3 blocks out of the bag.
What is the probability that 2 blocks are one color and the other block is a different color?

4/2/2013 11:01:02 PM

50/50. It either is, or it isn't.

4/2/2013 11:19:40 PM

very poorly worded.

4/3/2013 5:31:12 PM

^ no it is not. only thing missing is if it is with replacement or without. very easy problem, especially with replacement.

4/3/2013 6:46:33 PM

22%

4/3/2013 7:45:02 PM

Going to assume it is without replacement.

4/4/2013 9:56:06 AM

do your own homework

4/5/2013 11:08:09 AM

Really?

Probability that you draw exactly 2 black out of 21 (6 out of 21, 5 out of 20 and then 15 out of 19)

+

Probability that you draw exactly 2 green out of 21 (5 out of 21, 4 out of 20 and then 16 out of 19)

+

Probability that you draw exactly 2 red out of 21 (10 out of 21, 9 out of 20 and then 11 out of 19)


This isn't hard.

4/5/2013 9:21:28 PM

^Are you factoring the order you drew them?

Green,black,green or green,green,black

Believe it should be 66.17%

[Edited on June 25, 2013 at 3:58 PM. Reason : ]

6/25/2013 3:43:14 PM

Could someone just post all the answers to 5.3?

11/4/2013 10:51:13 PM

Quote :

"do your own homework"

11/4/2013 11:02:55 PM

Sure, I have all of the answer keys to every MA 114 homework assignment ever. Lemme git dem.

11/5/2013 9:24:44 AM

was walgreens already taken as a username?

11/5/2013 11:06:22 AM

Quote :

"Could someone just post all the answers to 5.3?"

Gah! I can feel the your desperation.

[Edited on November 5, 2013 at 12:18 PM. Reason : .]

11/5/2013 12:18:18 PM

In a group of 5 people, what is the probability that they all have different birthdays? [Assume that each is equally likely to be born on any of the 365 days of the year, i.e. no one is born on Feb. 29 in a leap year.]

Can anyone help me with this?

11/6/2013 1:36:04 PM

What is the probability that someone does not have a specific birthday in a given year?

11/7/2013 12:32:53 PM

would it be 1-P(of all have 5 the same bd)?

11/7/2013 1:30:19 PM

365*364*363*362*361*(1/365)^5

11/7/2013 2:41:00 PM