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 jar contains 16 red balls and 8 white balls. If 3 balls are selected
[#permalink]
20 Oct 2021, 09:16
20 Oct 2021, 09:16
Expert Reply
00:00
Question Stats:
57% (01:25) correct
42% (01:34) wrong based on 19 sessions
Hide Show timer Statistics
A jar contains 16 red balls and 8 white balls. If 3 balls are selected at random from the jar, what is the approximate probability that all balls selected are white?
A. 0.02
B. 0.03
C. 0.04
D. 0.05
E. 0.06
A. 0.02
B. 0.03
C. 0.04
D. 0.05
E. 0.06
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: A jar contains 16 red balls and 8 white balls. If 3 balls are selected
[#permalink]
20 Oct 2021, 09:42
20 Oct 2021, 09:42
1
Bookmarks
Carcass wrote:
A jar contains 16 red balls and 8 white balls. If 3 balls are selected at random from the jar, what is the approximate probability that all balls selected are white?
A. 0.02
B. 0.03
C. 0.04
D. 0.05
E. 0.06
A. 0.02
B. 0.03
C. 0.04
D. 0.05
E. 0.06
There are 24 balls in the jar (before any are removed)
P(all 3 balls are white) = P(1st ball is white AND 2nd ball is white AND 3rd ball is white)
= P(1st ball is white) x P(2nd ball is white) x P(3rd ball is white)
= 8/24 x 7/23 x 6/22
= 1/3 x 7/23 x 3/11
= 7/253
≈ 0.028
Answer: B
Re: A jar contains 16 red balls and 8 white balls. If 3 balls are selected
[#permalink]
24 Feb 2023, 11:01
24 Feb 2023, 11:01
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.
