Last visit was: 19 May 2024, 01:14 It is currently 19 May 2024, 01:14

Close

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

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GRE score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
User avatar
Retired Moderator
Joined: 07 Jun 2014
Posts: 4810
Own Kudos [?]: 10633 [0]
Given Kudos: 0
GRE 1: Q167 V156
WE:Business Development (Energy and Utilities)
Send PM
Manager
Manager
Joined: 06 Jun 2018
Posts: 102
Own Kudos [?]: 121 [0]
Given Kudos: 4
Send PM
User avatar
Retired Moderator
Joined: 07 Jun 2014
Posts: 4810
Own Kudos [?]: 10633 [0]
Given Kudos: 0
GRE 1: Q167 V156
WE:Business Development (Energy and Utilities)
Send PM
Target Test Prep Representative
Joined: 09 May 2016
Status:Head GRE Instructor
Affiliations: Target Test Prep
Posts: 181
Own Kudos [?]: 269 [0]
Given Kudos: 114
Location: United States
Send PM
Re: A class consists of 12 girls and 20 boys. One quarter of the [#permalink]
Expert Reply
sandy wrote:
A class consists of 12 girls and 20 boys. One quarter of the girls in the class have blue eyes. If a child is selected at random from the class, what is the probability that the child is a girl who does not have blue eyes?

(A) \(\frac{3}{32}\)
(B) \(\frac{9}{32}\)
(C) \(\frac{3}{8}\)
(D) \(\frac{23}{32}\)
(E) \(\frac{29}{32}\)


Since ¼ of the 12 girls have blue eyes, ¼ x 12 = 3 girls have blue eyes. So 9 girls don’t have blue eyes. Since there are 12 + 20 = 32 students in the class, the probability that a child is a girl who does not have blue eyes is 9/32.

Answer: B
Intern
Intern
Joined: 24 Jan 2021
Posts: 44
Own Kudos [?]: 43 [0]
Given Kudos: 463
GPA: 3.9
Send PM
Re: A class consists of 12 girls and 20 boys. One quarter of the [#permalink]
Total number of students = 32
One quarter of the girls in the class have blue eyes =12/4=3
required probability = 9/32
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Own Kudos [?]: 11737 [0]
Given Kudos: 136
Send PM
Re: A class consists of 12 girls and 20 boys. One quarter of the [#permalink]
sandy wrote:
A class consists of 12 girls and 20 boys. One quarter of the girls in the class have blue eyes. If a child is selected at random from the class, what is the probability that the child is a girl who does not have blue eyes?

(A) \(\frac{3}{32}\)
(B) \(\frac{9}{32}\)
(C) \(\frac{3}{8}\)
(D) \(\frac{23}{32}\)
(E) \(\frac{29}{32}\)


12 + 20 = 32, so there are 32 children in total.

There are 12 girls, and 1/4 of them own a cell phone.
1/4 of 12 = 3, so 3 girls own cell phones, which means the other 9 girls do NOT own cell phones

So, P(selected child is girl with WITHOUT a cell phone) = 9/32

Answer: B
Prep Club for GRE Bot
[#permalink]
Moderators:
Moderator
1085 posts
GRE Instructor
218 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne