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In a class 40% students complete their home work on time and get point

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Director
Director
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V
Joined: 18 Feb 2019
Posts: 581
Location: India
GMAT 1: 460 Q42 V13
GPA: 3.6
In a class 40% students complete their home work on time and get point  [#permalink]

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New post 09 Mar 2019, 09:43
5
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

59% (02:03) correct 41% (01:58) wrong based on 49 sessions

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In a class 40% students complete their homework on time and get points from their teacher. What is the percentage of students in the class who do not complete their homework on time if 50% of the students who complete their homework on time still do not get points from their teacher?

A. 80%
B. 60%
C. 50%
D. 40%
E. 20%
Intern
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B
Joined: 30 Jan 2019
Posts: 6
Re: In a class 40% students complete their home work on time and get point  [#permalink]

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New post 09 Mar 2019, 14:35
% complete, points = % complete* % points
40% = x% * (1 - % complete, don't get points)
40% = x% * 50%
2/5 = x% * 1/2
x% = 80% = % complete

therefore, % don't complete = 100-80 = 20%
ANSWER = E
Intern
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Joined: 16 Dec 2018
Posts: 1
Re: In a class 40% students complete their home work on time and get point  [#permalink]

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New post 10 Mar 2019, 10:39
Hi yashu612 ,
Please explain your solution in details.

Posted from my mobile device
Director
Director
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V
Joined: 18 Feb 2019
Posts: 581
Location: India
GMAT 1: 460 Q42 V13
GPA: 3.6
Re: In a class 40% students complete their home work on time and get point  [#permalink]

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New post 11 Mar 2019, 00:16
1
d2ge0044 wrote:
Hi yashu612 ,
Please explain your solution in details.

Posted from my mobile device

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Re: In a class 40% students complete their home work on time and get point   [#permalink] 11 Mar 2019, 00:16
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