It is currently 27 Jun 2019, 00:14

### 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

# GRE Math Challenge #81-One integer will be randomly selected

Author Message
TAGS:
GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4809
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 120

Kudos [?]: 1914 [0], given: 397

GRE Math Challenge #81-One integer will be randomly selected [#permalink]  09 May 2015, 10:23
Expert's post
00:00

Question Stats:

77% (01:16) correct 22% (01:07) wrong based on 9 sessions
One integer will be randomly selected from the integers 11 to 60, inclusive. What is the probability that the selected integer will be a perfect square or a perfect cube?

(A) 0.1
(B) 0.125
(C) 0.16
(D) 0.5
(E) 0.9
[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

Director
Joined: 20 Apr 2016
Posts: 924
WE: Engineering (Energy and Utilities)
Followers: 12

Kudos [?]: 687 [0], given: 149

Re: GRE Math Challenge #81-One integer will be randomly selected [#permalink]  14 Dec 2017, 06:46
sandy wrote:
One integer will be randomly selected from the integers 11 to 60, inclusive. What is the probability that the selected integer will be a perfect square or a perfect cube?

(A) 0.1
(B) 0.125
(C) 0.16
(D) 0.5
(E) 0.9

Here
Total number of integers from 11 to 60 = 50
perfect squares from 11 to 60 are = 16 , 25, 36 and 49

perfect cube = 27

Hence there are 5 integers that can be either a perfect square or a perfect cube

Therefore probability = $$\frac{5}{50}$$= 0.1
_________________

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

Rules for Posting https://greprepclub.com/forum/rules-for ... -1083.html

Re: GRE Math Challenge #81-One integer will be randomly selected   [#permalink] 14 Dec 2017, 06:46
Display posts from previous: Sort by