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Eric, Nick and Archi make contributions to the Society Of Nature Prote

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Bunuel
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Eric, Nick and Archi make contributions to the Society Of Nature Prote [#permalink] New post  29 Jun 2016, 07:49
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Eric, Nick and Archi make contributions to the Society Of Nature Protection in the ratio of 5:3:2.5. If altogether they contribute 5145 Nis, how much more money does Nick contribute than Archi?

A. 128 Nis
B. 212 Nis
C. 234 Nis
D. 245 Nis
E. 288 Nis
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Re: Eric, Nick and Archi make contributions to the Society Of Nature Prote [#permalink] New post  29 Jun 2016, 08:45
Answer is D: 245 Nis

Normalising the fraction from 5:3:2.5 to 10:6:5 (Eric: Nick:Archi)
Given Nick contributes one unit more than Archi and one unit of 5145/(10+6+5) = 245
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Re: Eric, Nick and Archi make contributions to the Society Of Nature Prote [#permalink] New post  29 Jun 2016, 10:42
Bunuel wrote:
Eric, Nick and Archi make contributions to the Society Of Nature Protection in the ratio of 5:3:2.5. If altogether they contribute 5145 Nis, how much more money does Nick contribute than Archi?

A. 128 Nis
B. 212 Nis
C. 234 Nis
D. 245 Nis
E. 288 Nis


Nick contribution - Archi cintribution

5145/10.5 (3-2.5)

5145/10.5 *.5= 245

D is the answer
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Re: Eric, Nick and Archi make contributions to the Society Of Nature Prote [#permalink] New post  29 Jun 2016, 20:12
Bunuel wrote:
Eric, Nick and Archi make contributions to the Society Of Nature Protection in the ratio of 5:3:2.5. If altogether they contribute 5145 Nis, how much more money does Nick contribute than Archi?

A. 128 Nis
B. 212 Nis
C. 234 Nis
D. 245 Nis
E. 288 Nis


5+3+2.5=10.5

10.5x=5145

Nick-Arhi=3x-2.5x=0.5x

If 10.5x=5145
then 0.5x=?

0.5*5145/10.5=245

Answer: D
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Re: Eric, Nick and Archi make contributions to the Society Of Nature Prote [#permalink] New post  29 Jun 2016, 23:31
Eric, Nick and Archi make contributions to the Society Of Nature Protection in the ratio of 5:3:2.5. If altogether they contribute 5145 Nis, how much more money does Nick contribute than Archi?

A. 128 Nis
B. 212 Nis
C. 234 Nis
D. 245 Nis
E. 288 Nis


E:N:A 5:3:2.5

so total = 5x + 3x + 2.5 x = 10.5 x = 5145
so x = 490

Nick Contribution is 0.5 more than Archi so 0.5 x =0.5 * 490 = 245

So D. 245 Nis is the correct answer
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Re: Eric, Nick and Archi make contributions to the Society Of Nature Prote [#permalink]
29 Jun 2016, 23:31
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