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Probability... requesting explanation please!

by hwiya320 » Thu Dec 04, 2008 8:13 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 12:27 pm

A certain school teaches fourth, fifth. . . . . . . . .

by Vincen » Tue Oct 03, 2017 5:10 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 11:31 am

What is the perimeter...

by BTGmoderatorLU » Tue Oct 17, 2017 6:53 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 11:30 am

How many positive integers...

by BTGmoderatorLU » Thu Oct 19, 2017 7:16 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 11:29 am

A basketball team plays games only

by VJesus12 » Sun Oct 15, 2017 5:33 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 11:27 am

2,600 has how many positive divisors?

by Vincen » Mon Oct 16, 2017 6:38 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 11:26 am

If the sum of a list of consecutive...

by BTGmoderatorLU » Sat Oct 21, 2017 2:47 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 11:19 am

Juan goes out cycling outdoors. He travels at an average speed of 15 km/h...

by BTGmoderatorLU » Tue Jan 28, 2020 3:34 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 11:15 am

12 teams!

by fruti_yum » Sat Aug 01, 2009 5:01 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 11:02 am

500 PS#16

by dunkin77 » Sun Apr 01, 2007 6:16 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 10:17 am

An odd number added to itself an odd number of times yields

by Vincen » Fri Sep 29, 2017 5:52 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 10:15 am

What is the largest 3 digit. . . .

by Vincen » Tue Oct 03, 2017 4:51 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 10:10 am

4+2^2+2^3+2^4+2^5+2^6+2^7=

by Vincen » Fri Sep 29, 2017 6:37 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 10:09 am

Fractions

by BTGmoderatorRO » Sun Sep 10, 2017 10:09 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 10:07 am

The sum of the squares of three numbers is 138, while the

by nkmungila1 » Tue Oct 03, 2017 2:44 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 10:06 am

A whale goes on a feeding frenzy that lasts for 9 hours. For the first hour he catches and eats x kilos of plankton...

by BTGmoderatorLU » Mon Jan 27, 2020 12:25 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 10:04 am

Probability

by swerve » Mon Jan 27, 2020 6:06 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 10:03 am

In a certain appliance store, each model of television is uniquely designated by a code made up of a particular ordered

by BTGmoderatorDC » Mon Jan 27, 2020 5:42 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 10:02 am

Of 110 customers at a restaurant, 63 order hamburgers and 71 order French fries...

by AAPL » Tue Jan 28, 2020 4:42 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 10:01 am

Last year, 36 houses in a certain development

by NandishSS » Sun Sep 04, 2016 5:55 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 10:00 am

Word Problems

by swerve » Fri Jan 24, 2020 6:27 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 5:17 am

If in a certain population, people are born at an average rate of 9...

by AAPL » Wed Jan 22, 2020 7:20 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 5:16 am

A certain hall contains two cuckoo clocks. If the first clock chirps 20 times per hour and the second clock chirps 10

by BTGmoderatorDC » Fri Jan 24, 2020 4:37 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 5:15 am

The main ingredient in a certain prescription drug capsule costs $500 per kilogram. If each capsule...

by BTGmoderatorLU » Sat Jan 25, 2020 11:58 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 5:14 am

How many integers between 1 and 10^21 are such that the sum of their digits is 2?

by BTGmoderatorDC » Sun Jan 26, 2020 2:15 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 5:10 am

Flor is choosing three of five colors of paint to use for

by swerve » Sat Feb 16, 2019 9:56 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 5:09 am

A palindrome

by tata » Mon Mar 01, 2010 10:30 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 5:07 am

A pyramid with four equal-sized flat surfaces and a base of 36 ft2 has a height of 10 feet. What is the total surface

by BTGmoderatorDC » Sun Jan 26, 2020 10:17 pm

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 5:05 am

A device calculates the worth of gemstones based on quality...

by BTGmoderatorLU » Sun Jan 26, 2020 5:48 am

Last post by Scott@TargetTestPrep
Sun Feb 02, 2020 5:02 am

A collection of 16 coins, each with a face value of either 10 cents or 25 cents, has a total face value of $2.35. How

by BTGmoderatorDC » Tue Jan 28, 2020 6:40 pm

Last post by deloitte247
Sat Feb 01, 2020 10:19 pm

In the figure below, what is x?

by Max@Math Revolution » Wed Jan 22, 2020 5:15 pm

Last post by deloitte247
Sat Feb 01, 2020 4:32 am

A bag contains 15 wool scarves, exactly one of which is red and exactly one of which is green. If Deborah reaches in and

by BTGmoderatorDC » Fri Jan 31, 2020 4:40 pm

Last post by Jay@ManhattanReview
Fri Jan 31, 2020 9:45 pm

Fractions/Ratios/Decimals

by swerve » Thu Jan 30, 2020 3:13 pm

Last post by Brent@GMATPrepNow
Fri Jan 31, 2020 6:53 am

A moneylender lent $2000 to Ricky with the condition that Ricky will pay back 5 percent...

by AAPL » Fri Jan 31, 2020 5:35 am

Last post by AAPL
Fri Jan 31, 2020 5:35 am

How many integers are there satisfying 1 < [3 - x/2] < 4?

by Max@Math Revolution » Tue Jan 28, 2020 11:52 pm

Last post by Max@Math Revolution
Fri Jan 31, 2020 1:44 am

At a certain school of 200 students, the students can study French, Spanish, both or neither. Just as many study both as

by BTGmoderatorDC » Thu Jan 30, 2020 9:10 pm

Last post by BTGmoderatorDC
Thu Jan 30, 2020 9:10 pm

Point O is the circumcenter of triangle ABC, and the length of AC i

by Max@Math Revolution » Tue Jan 28, 2020 12:01 am

Last post by Max@Math Revolution
Wed Jan 29, 2020 11:43 pm

OG 13 Problem

by oquiella » Tue Dec 22, 2015 3:08 pm

Last post by Brent@GMATPrepNow
Wed Jan 29, 2020 12:16 pm

please explain gmat prep question

by yvonne12 » Sun Apr 01, 2007 3:37 pm

Last post by Scott@TargetTestPrep
Wed Jan 29, 2020 5:23 am

profit problem

by profiler01 » Fri Dec 01, 2006 5:21 pm

Last post by Scott@TargetTestPrep
Wed Jan 29, 2020 5:21 am

If a, b, and c are three different positive. . .

by Vincen » Fri Sep 29, 2017 7:03 pm

Last post by Scott@TargetTestPrep
Wed Jan 29, 2020 5:20 am

Rate and Distance

by BTGmoderatorRO » Sat Sep 30, 2017 7:42 pm

Last post by Scott@TargetTestPrep
Wed Jan 29, 2020 5:18 am

Word problems

by BTGmoderatorRO » Sat Sep 30, 2017 7:28 pm

Last post by Scott@TargetTestPrep
Wed Jan 29, 2020 5:17 am

polygon

by BTGmoderatorRO » Sat Sep 30, 2017 7:14 pm

Last post by Scott@TargetTestPrep
Wed Jan 29, 2020 5:15 am

Statistics and set problems

by BTGmoderatorRO » Sat Sep 30, 2017 7:50 pm

Last post by Scott@TargetTestPrep
Wed Jan 29, 2020 5:13 am

Difficult Math Problem #70 - Permutations

by 800guy » Mon Dec 04, 2006 2:43 pm

Last post by Scott@TargetTestPrep
Wed Jan 29, 2020 5:12 am

Word problems

by BTGmoderatorRO » Sat Sep 30, 2017 7:57 pm

Last post by Scott@TargetTestPrep
Wed Jan 29, 2020 5:10 am

If the average (arithmetic mean) of the 4 numbers n + 2, 2n - 3, 4n + 1, and 7n + 4 is 15, what is the value of n?

by BTGmoderatorDC » Thu Jan 23, 2020 5:18 pm

Last post by Scott@TargetTestPrep
Wed Jan 29, 2020 5:03 am

Point I is the incenter of triangle ABC in the figure. The figure shows AB = 10, AC = 8, ∠A

by Max@Math Revolution » Mon Jan 27, 2020 6:21 pm

Last post by Max@Math Revolution
Tue Jan 28, 2020 11:51 pm

Rami is painting decorative boxes. For each box he paints the lid in one color, the 4 sides in a different color, and

by BTGmoderatorDC » Tue Jan 21, 2020 5:54 pm

Last post by Scott@TargetTestPrep
Tue Jan 28, 2020 6:16 am

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