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14 Sep 2016, 06:40
Kudos
Bookmarks
D
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:
70% (02:12) correct
30%
(02:05)
wrong
based on 1332
sessions
History
Date
Time
Result
Not Attempted Yet
There are 2 parallel line segments AB and CD in a plane. AB contains 12 marked points whereas CD contains 8 marked points.
How many triangles can be formed by using these marked points as vertices?
a. \((12!*28) + (8!*66)\)
b. \(12!*8!\)
c. \(^{20}C_3\)
d. \(864\)
e. \(1024\)
How many triangles can be formed by using these marked points as vertices?
a. \((12!*28) + (8!*66)\)
b. \(12!*8!\)
c. \(^{20}C_3\)
d. \(864\)
e. \(1024\)
14 Sep 2016, 07:20
Kudos
Bookmarks
TheOutlawTorn
There are 2 parallel line segments AB and CD in a plane. AB contains 12 marked points whereas CD contains 8 marked points.
How many triangles can be formed by using these marked points as vertices?
a. \((12!*28) + (8!*66)\)
b. \(12!*8!\)
c. \(^{20}C_3\)
d. \(864\)
e. \(1024\)
How many triangles can be formed by using these marked points as vertices?
a. \((12!*28) + (8!*66)\)
b. \(12!*8!\)
c. \(^{20}C_3\)
d. \(864\)
e. \(1024\)
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Hope it helps.
Senthil1981
Joined: 23 Apr 2015
Last visit: 14 Oct 2021
Posts: 230
Given Kudos: 36
Location: United States
Concentration: General Management, International Business
Schools: Booth PT '19 Ross Weekend"19
WE:Engineering (Consulting)
14 Sep 2016, 07:05
Kudos
Bookmarks
TheOutlawTorn
There are 2 parallel line segments AB and CD in a plane. AB contains 12 marked points whereas CD contains 8 marked points.
How many triangles can be formed by using these marked points as vertices?
a. \((12!*28) + (8!*66)\)
b. \(12!*8!\)
c. \(^{20}C_3\)
d. \(864\)
e. \(1024\)
How many triangles can be formed by using these marked points as vertices?
a. \((12!*28) + (8!*66)\)
b. \(12!*8!\)
c. \(^{20}C_3\)
d. \(864\)
e. \(1024\)
Combinations Problem :
Pick any 2 from AB and any one from CD, so \(12C_2 * 8\)
+
Pick any 2 from CD and any one from AB, so \(8C_2 * 12\)
= \(12C_2 * 8 + 8C_2 *12 = 864\)
Answer is D
