It is currently 10 Dec 2018, 13:36

GMAT 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

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

Tarik has a pile of 6 green chips numbered 1 through 6 respe

Author Message
TAGS:
GMAT Club Legend
Joined: 07 Jun 2014
Posts: 4749
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 93

Kudos [?]: 1652 [0], given: 396

Tarik has a pile of 6 green chips numbered 1 through 6 respe [#permalink]  05 Aug 2018, 14:40
Expert's post
00:00

Question Stats:

81% (00:49) correct 18% (00:31) wrong based on 16 sessions
Tarik has a pile of 6 green chips numbered 1 through 6 respectively and another pile of 6 blue chips numbered 1 through 6 respectively. Tarik will randomly pick 1 chip from
the green pile and 1 chip from the blue pile.

 Quantity A Quantity B The probability that both chips selected by Tarik will display a number less than 4. $$\frac{1}{2}$$

A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

GMAT Club Legend
Joined: 07 Jun 2014
Posts: 4749
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 93

Kudos [?]: 1652 [0], given: 396

Re: Tarik has a pile of 6 green chips numbered 1 through 6 respe [#permalink]  07 Aug 2018, 06:22
Expert's post
Explanation

In this problem, Tarik is not picking 1 chip out of all 12. Rather, he is picking 1 chip out of 6 green ones, and then picking another chip out of 6 blue ones. There are 3 green chips with numbers less than 4, so Tarik has a $$\frac{3}{6}$$ chance of selecting a green chip showing a number less than 4.

Likewise, Tarik has a $$\frac{3}{6}$$ chance of selecting a blue chip showing a number less than 4.

Therefore, Quantity A is equal to $$\frac{3}{6}\times \frac{3}{6}=\frac{1}{2}\times\frac{1}{2}=\frac{1}{4}$$. Quantity B is greater.
_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Re: Tarik has a pile of 6 green chips numbered 1 through 6 respe   [#permalink] 07 Aug 2018, 06:22
Display posts from previous: Sort by