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Eighty students are attending summer school courses at Beaver Falls Hi

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Eighty students are attending summer school courses at Beaver Falls Hi  [#permalink]

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New post 01 Nov 2019, 08:04
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A
B
C
D
E

Difficulty:

  65% (hard)

Question Stats:

64% (02:39) correct 36% (02:12) wrong based on 58 sessions

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Eighty students are attending summer school courses at Beaver Falls High School.X have registered for Spanish,Y have registered for Math, and Z have registered for neither Spanish nor Math.How many have registered for BOTH Spanish and Math?

(1) Thirty students are not taking Spanish.

(2) Y=40% of X,while Z=75% of Y


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Re: Eighty students are attending summer school courses at Beaver Falls Hi  [#permalink]

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New post 01 Nov 2019, 08:36
1
Bunuel wrote:
Eighty students are attending summer school courses at Beaver Falls High School.X have registered for Spanish,Y have registered for Math, and Z have registered for neither Spanish nor Math.How many have registered for BOTH Spanish and Math?

(1) Thirty students are not taking Spanish.

(2) Y=40% of X,while Z=75% of Y


Are You Up For the Challenge: 700 Level Questions


Let the number of students who registered for both = A

Refer to table structure,
Image

(1) Thirty students are not taking Spanish.
Image
--> Insufficient

(2) Y=40% of X,while Z=75% of Y
Image
--> Insufficient

Combining (1) & (2),
Image
--> A + 15 = 20
--> A = 5 --> Sufficient

IMO Option C
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Re: Eighty students are attending summer school courses at Beaver Falls Hi  [#permalink]

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New post 02 Nov 2019, 04:57
Bunuel wrote:
Eighty students are attending summer school courses at Beaver Falls High School.X have registered for Spanish,Y have registered for Math, and Z have registered for neither Spanish nor Math.How many have registered for BOTH Spanish and Math?

(1) Thirty students are not taking Spanish.

(2) Y=40% of X,while Z=75% of Y


Are You Up For the Challenge: 700 Level Questions


solve using 2x2
the question would be solved using both stmnts

---s---ns----total
M--5---15----20
NM- 45--15---60
total--50--30--80
IMO C ; 5
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Re: Eighty students are attending summer school courses at Beaver Falls Hi   [#permalink] 02 Nov 2019, 04:57
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Eighty students are attending summer school courses at Beaver Falls Hi

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