Last visit was: 21 May 2024, 18:01 It is currently 21 May 2024, 18:01
Decision Tracker
My Rewards
Unanswered
Active Topics
New posts
New comers' posts
Close
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
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

There was a trial going on in a laboratory. Students were doing an

SORT BY:
Date
Kudos
Tags:
Find Similar Topics 
Show Tags
Hide Tags
User avatar
S
GeorgeKo111
Manager
Manager
Joined: 21 Jun 2019
Posts: 83
Own Kudos [?]: 73 [1]
Given Kudos: 39
Location: Canada
Concentration: Finance, Accounting
GMAT 1: 670 Q48 V34
GPA: 3.78
Send PM
There was a trial going on in a laboratory. Students were doing an [#permalink] There was a trial going on in a laboratory. Students were doing an   Updated on: 16 Jul 2019, 13:57
1
Bookmarks
00:00
A
B
C
D
E

Difficulty:

15% (low)

Question Stats:

82% (00:52) correct 18% (01:47) wrong based on 34 sessions
Hide Show timer Statistics
There was a trial going on in a laboratory. Students were doing an experiment. This experiment showed that the probability of a bird flies away when the cage is opened is 7/10. It was also observed that the bird that flew away also comes back is 1/5.what is the probability that when the cage is opened a bird not only flies away but also comes back.
a. 7/10
b. 3/10
c. 1/5
d. 7/50
e. None of the above
ShowHide Answer
Official Answer
D

Originally posted by GeorgeKo111 on 16 Jul 2019, 11:51.
Last edited by GeorgeKo111 on 16 Jul 2019, 13:57, edited 1 time in total.
User avatar
S
Shrey9
Current Student
Joined: 23 Apr 2018
Posts: 130
Own Kudos [?]: 63 [0]
Given Kudos: 176
Send PM
Reviews Badge
Re: There was a trial going on in a laboratory. Students were doing an [#permalink] There was a trial going on in a laboratory. Students were doing an   16 Jul 2019, 13:23
Is it a DS question?

Posted from my mobile device
User avatar
S
GeorgeKo111
Manager
Manager
Joined: 21 Jun 2019
Posts: 83
Own Kudos [?]: 73 [0]
Given Kudos: 39
Location: Canada
Concentration: Finance, Accounting
GMAT 1: 670 Q48 V34
GPA: 3.78
Send PM
Re: There was a trial going on in a laboratory. Students were doing an [#permalink] There was a trial going on in a laboratory. Students were doing an   16 Jul 2019, 13:58
Shrey9 wrote:
Is it a DS question?

Posted from my mobile device


no it is a PS.
User avatar
G
RusskiyLev
Manager
Manager
Joined: 26 Mar 2019
Posts: 69
Own Kudos [?]: 104 [1]
Given Kudos: 142
Location: Azerbaijan
Concentration: Finance, Strategy
Schools: Booth '23 (II)
GMAT 1: 730 Q50 V38
Send PM
Reviews Badge
Re: There was a trial going on in a laboratory. Students were doing an [#permalink] There was a trial going on in a laboratory. Students were doing an   16 Jul 2019, 14:34
1
Kudos
Quote:
There was a trial going on in a laboratory. Students were doing an experiment. This experiment showed that the probability of a bird flies away when the cage is opened is 7/10. It was also observed that the bird that flew away also comes back is 1/5.what is the probability that when the cage is opened a bird not only flies away but also comes back.


In order for two probabilities to happen, we need to multiply them by each other: P1 * P2 = P
7/10 * 1/5 = 7/50

Answer: D
GMAT Club Bot
gmatclubot
Re: There was a trial going on in a laboratory. Students were doing an [#permalink]
16 Jul 2019, 14:34
Moderator:
Bunuel
Math Expert
93373 posts