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.

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:

Two members of a club are to be selected to represent the [#permalink]
24 Oct 2006, 16:16

Two members of a club are to be selected to represent the club at a national meeting. If the re are 190 different possible selection of 2 members, How many members does the club have?

A)20
B)40
C)57
D)95
E)170

In a class of 30 student, 2 student did not borrowed any books from the library. 12 student each borrowed 1 book, 10 students ach borrowed 2 books and the rest of the students each borrowed at least 3 books. If the average (mean) number of books borrowed per students was 2. What is the maximum number of books that any student could have borrowed?

Re: Two Math questions [#permalink]
24 Oct 2006, 19:57

Two members of a club are to be selected to represent the club at a national meeting. If the re are 190 different possible selection of 2 members, How many members does the club have?

A)20 B)40
C)57
D)95
E)170

C(n,2) = 190
n!/2(n-2)! = 190

n(n-1) = 380.
n=20

In a class of 30 student, 2 student did not borrowed any books from the library. 12 student each borrowed 1 book, 10 students ach borrowed 2 books and the rest of the students each borrowed at least 3 books. If the average (mean) number of books borrowed per students was 2. What is the maximum number of books that any student could have borrowed?

A)3
B)5
C)8
D)13 E)15

Total number of books borrowed = 60.
24 students already account for 32 books.
No. of students left = 6; books left = 28.
Each student borrowed at least 3 books. So 5 students borrowed 15 books. The remaining student borrowed the remaining 13 books.

gmatclubot

Re: Two Math questions
[#permalink]
24 Oct 2006, 19:57