Homework Help: college

Posted by Jess on Wednesday, November 4, 2009 at 3:35am.

Given 24 pens, either red or blue. If 4 are blue, what is the probability of you select 2 pens AT LEAST 1 will be blue. (without replacement, that is, you are taking 2 separate pens)

Probability - drwls, Wednesday, November 4, 2009 at 5:19am
Add the probabilities of:
blue-red, red-blue and blue-blue.
(4/24)*(19/23) + (20/24)*(4/23) + (4/24)(3/23) = [76 + 76 + 12)/552 = 164/552
= 41/138

Answer this Question

Related Questions

math,(fraction) - Mr Lim put some red pens and blue pens into a box.The ratio of...
MATH HELP - There are 20 red and blue pens in abox. There are 3times as many ...
math - luke put 2 red pens, 7 blue pens, and 1 black pen in a bag, closed it and...
probabliliyiuyiuly... - ok i'd appreciate it if someone could give me the ...
math - sasha has 5 red pens and 4 blue pens in her bag. she will randomly pick ...
math - sasha has 5 red pens and 4 blue pens in her bag. she will randomly pick ...
algebra - A college bookstore ordered six boxes of red pens. The store sold 37 ...
math - A college bookstore ordered six boxes of red pens. The store sold 32 red ...
math - A box of pens contains 54 pens with black ink 36 with blue ink and 30 ...
pre algebra - A college bookstore ordered 6 boxes of red pens. The store sold 32...

For Further Reading

First Name:
School Subject:
Answer: