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13 Oct 2020, 20:32
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
58% (01:15) correct
42%
(01:03)
wrong
based on 145
sessions
History
Date
Time
Result
Not Attempted Yet
What is the greatest number of intersection points between 6 straight lines, if they are arranged as three pairs of parallel lines?
A. 8
B. 9
C. 12
D. 18
E. 36
A. 8
B. 9
C. 12
D. 18
E. 36
Updated on: 12 Oct 2024, 05:19
Originally posted by QuantMadeEasy on 14 Oct 2020, 00:24.
Last edited by QuantMadeEasy on 12 Oct 2024, 05:19, edited 1 time in total.
Last edited by QuantMadeEasy on 12 Oct 2024, 05:19, edited 1 time in total.
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Quote:
Step 1: Understanding the question
Three pair of parallel lines can be arranged in a form of a triangle to find maximum intersection points (refer to the attachment)
C is correct
Study from the best self learning GMAT quant course:
https://www.udemy.com/course/best-gmat- ... 37602183BB
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Untitled.png [ 7.12 KiB | Viewed 2797 times ]
ramlala
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14 Oct 2020, 08:06
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There are 3 pairs of parallel lines say x, y, z
so 3x2x2 = 12 combinations
In other way
Intersection of x & y = 4 points
Intersection of y & z = 4 points
Intersection of x & Z = 4 points
Total = 12
Ans: C
so 3x2x2 = 12 combinations
In other way
Intersection of x & y = 4 points
Intersection of y & z = 4 points
Intersection of x & Z = 4 points
Total = 12
Ans: C
