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# Over a four-game stretch, Dennis's bowling scope average 240. By what

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Manager
Joined: 02 Sep 2018
Posts: 67
Location: United States
WE: Information Technology (Computer Software)
Over a four-game stretch, Dennis's bowling scope average 240. By what  [#permalink]

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19 Sep 2018, 15:43
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Difficulty:

5% (low)

Question Stats:

88% (00:45) correct 12% (01:32) wrong based on 43 sessions

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Over a four-game stretch, Dennis's bowling scope average 240. By what percent would his score have had to have been higher in order for him to average a perfect game (300)?
A) 22%
B) 25%
C) 20%
D) 40%
E) 60%
Manager
Joined: 02 Sep 2018
Posts: 67
Location: United States
WE: Information Technology (Computer Software)
Re: Over a four-game stretch, Dennis's bowling scope average 240. By what  [#permalink]

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19 Sep 2018, 15:51
My questions:
1) I was lost in the translation of the problem - esp ..."have had to have been..."? What is recommended practice? How do i ensure that i understand the question thoroughly before attempting an answer.
2) Many times, i waste time in rereading the problem again and again. How do i avoid that and ensure i understand the problem in first go itself?

I am not sure if my question make any sense. Appreciate everyone's time here.
CEO
Joined: 11 Sep 2015
Posts: 3334
Re: Over a four-game stretch, Dennis's bowling scope average 240. By what  [#permalink]

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15 Nov 2018, 06:28
Top Contributor
Cinematiccuisine wrote:
Over a four-game stretch, Dennis's bowling scope average 240. By what percent would his score have had to have been higher in order for him to average a perfect game (300)?
A) 22%
B) 25%
C) 20%
D) 40%
E) 60%

In other words, an increase from 240 to 300 represents what kind of percent increase?

Percent increase = (100)(new - old)/old
= (100)(300 - 240)/240
= (100)(60)/240
= (100)(1/4)
= 25%

Cheers,
Brent
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Joined: 12 Apr 2011
Posts: 27
Location: United Arab Emirates
Concentration: Strategy, Marketing
Schools: CBS '21, Yale '21, INSEAD
GMAT 1: 670 Q50 V31
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Over a four-game stretch, Dennis's bowling scope average 240. By what  [#permalink]

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15 Nov 2018, 09:41
Cinematiccuisine wrote:
Over a four-game stretch, Dennis's bowling scope average 240. By what percent would his score have had to have been higher in order for him to average a perfect game (300)?
A) 22%
B) 25%
C) 20%
D) 40%
E) 60%

Current Average: 240
Perfect Average: 300

So an increase of 60 average points is required

To calculate increase = $$\frac{Expected Increase}{Current Average}*100$$ %
=$$\frac{60}{240}*100$$ %
=$$\frac{100}{4}$$ %
=25%
Hence B is the correct answer
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Over a four-game stretch, Dennis's bowling scope average 240. By what &nbs [#permalink] 15 Nov 2018, 09:41
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