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problem solving - 700+ question

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problem solving - 700+ question [#permalink]

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New post 18 May 2010, 18:30
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A
B
C
D
E

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Question Stats:

33% (02:20) correct 67% (01:36) wrong based on 12 sessions

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Could anyone please help me with this question

A right triangle ABC has to be constructed in the xy-plane so that the right angle is at A and AB is parallel to x axis. The coordinates of A, B and C are to satisfy the inequalities -6 ≤ x ≤ 2 and 1 ≤ y ≤ 11. The number of different triangles that can be constructed with these properties are?

a. 792

b. 990

c. 7920

d. 49

e.2922
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Re: problem solving - 700+ question [#permalink]

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New post 18 May 2010, 19:19
i guess the answer is 7920!! there is a similar type of question in OG the 11th edition.
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Re: problem solving - 700+ question [#permalink]

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New post 18 May 2010, 22:32
I also guess its 7920.
for A-9*11
for B-8
for C-10
so total would be 9*11*8*10 = 7920
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Re: problem solving - 700+ question [#permalink]

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New post 19 May 2010, 19:21
yep, that is the calculation. but if you want to see the explanation, you can look at OG 11th ed problem solving question # 248.
Re: problem solving - 700+ question   [#permalink] 19 May 2010, 19:21
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