GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
A box contains 4 red chips and 2 blue chips. If two chips ar
[#permalink]
04 Feb 2020, 10:31
04 Feb 2020, 10:31
00:00
Question Stats:
88% (01:24) correct
11% (01:34) wrong based on 35 sessions
Hide Show timer Statistics
A box contains 4 red chips and 2 blue chips. If two chips are selected at random without replacement, what is the probability that the chips are different colors?
[A] \(\frac{ 1}{2}\)
[b] \(\frac{ 8}{15}\)
[C] \(\frac{ 7}{12}\)
[D] \(\frac{ 2}{3}\)
[E] \(\frac{ 7}{10}\)
[A] \(\frac{ 1}{2}\)
[b] \(\frac{ 8}{15}\)
[C] \(\frac{ 7}{12}\)
[D] \(\frac{ 2}{3}\)
[E] \(\frac{ 7}{10}\)
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: A box contains 4 red chips and 2 blue chips. If two chips ar
[#permalink]
05 Feb 2020, 06:48
05 Feb 2020, 06:48
1
1
Bookmarks
huda wrote:
A box contains 4 red chips and 2 blue chips. If two chips are selected at random without replacement, what is the probability that the chips are different colors?
[A] \(\frac{ 1}{2}\)
\(\frac{ 8}{15}\)
[C] \(\frac{ 7}{12}\)
[D] \(\frac{ 2}{3}\)
[E] \(\frac{ 7}{10}\)
[A] \(\frac{ 1}{2}\)
\(\frac{ 8}{15}\)
[C] \(\frac{ 7}{12}\)
[D] \(\frac{ 2}{3}\)
[E] \(\frac{ 7}{10}\)
P(different colors) = P(1st chip is red [b]and 2nd chip is blue OR 1st chip is blue and 2nd chip is red)
= P(1st chip is red and 2nd chip is blue) + P(1st chip is blue and 2nd chip is red)
= P(1st chip is red) x P(2nd chip is blue) + P(1st chip is blue) x P(2nd chip is red)
= 4/6 x 2/5 + 2/6 x 4/5
= 8/30 + 8/30
= 16/30
= 8/15
Answer: B
Cheers,
Brent
Re: A box contains 4 red chips and 2 blue chips. If two chips ar
[#permalink]
24 Feb 2023, 10:53
24 Feb 2023, 10:53
Hello from the GRE Prep Club BumpBot!
Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
