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 GMAT 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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

In the graduating class of a certain college, 48 percent of [#permalink]

Show Tags

20 Mar 2012, 09:39

1

This post received KUDOS

4

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

15% (low)

Question Stats:

83% (02:17) correct
17% (01:32) wrong based on 305 sessions

HideShow timer Statictics

In the graduating class of a certain college, 48 percent of the students are male and 52 percent are female. In this class 40 percent of the male and 20 percent of the female students are 25 years old or older. If one student in the class is randomly selected, approximately what is the probability that he or she will be less than 25 years old?

Re: In the graduating class of a certain college, 48 percent of [#permalink]

Show Tags

20 Mar 2012, 13:06

3

This post received KUDOS

Expert's post

2

This post was BOOKMARKED

enigma123 wrote:

In the graduating class of a certain college, 48 percent of the students are male and 52 percent are female. In this class 40 percent of the male and 20 percent of the female students are 25 years old or older. If one student in the class is randomly selected, approximately what is the probability that he or she will be less than 25 years old?

A. 0.9 B. 0.7 C. 0.45 D. 0.3 E. 0.25

Percent of students who are 25 years old or older is 0.4*48+0.2*52=~30, so percent of people who are less than 25 years old is 100-30=70.

Answer: B.

This can also be done with an approximation method. Since percent of men and women are almost the same (48% and 52%) then percent of students who are 25 years old or older will be close to the average of 40% and 20%, so close to 30%, which makes percent of people who are less than 25 years old close to 70%.

Re: In the graduating class of a certain college, 48 percent of [#permalink]

Show Tags

07 Jun 2013, 07:22

2

This post received KUDOS

1

This post was BOOKMARKED

I like to make diagrams. For me, it is easy to see clear steps this way

Attachment:

Class under 25.jpg [ 27.08 KiB | Viewed 7552 times ]

Step 1: Fill in what you know. 48% male, 52% female Step 2: Do known calculations: 48% x 40% = 19.2%. 52% x 20% = 10.4% Step 3: Fill in the rest of the chart as necessary. In this case, you just need the total 25 and older (19.2% + 10.4% = 29.6%) and under 25 (100-29.6%). Step 4: Find the answer. The % under 25 is 70.4% which is approximately 70%

Re: In the graduating class of a certain college, 48 percent of [#permalink]

Show Tags

03 Nov 2014, 18:51

Hello from the GMAT Club BumpBot!

Thanks to another GMAT 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. _________________

Re: In the graduating class of a certain college, 48 percent of [#permalink]

Show Tags

29 Nov 2014, 21:27

Shocked this is an actual gmat question. The percentages don't give interger values for those 25+. Had it not been for the "approximatly" I would have just thrown my hands in resignation. Still such an odd questions.

Re: In the graduating class of a certain college, 48 percent of [#permalink]

Show Tags

29 Jan 2016, 05:52

Hello from the GMAT Club BumpBot!

Thanks to another GMAT 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. _________________

So, my final tally is in. I applied to three b schools in total this season: INSEAD – admitted MIT Sloan – admitted Wharton – waitlisted and dinged No...

HBS alum talks about effective altruism and founding and ultimately closing MBAs Across America at TED: Casey Gerald speaks at TED2016 – Dream, February 15-19, 2016, Vancouver Convention Center...