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05 Apr 2016, 06:03
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
83% (01:10) correct
17%
(01:38)
wrong
based on 150
sessions
History
Date
Time
Result
Not Attempted Yet
In a certain circle there are 10 points. What is the number of the hexagons connecting 6 points of the 10 points?
A. 180
B. 196
C. 210
D. 240
E. 256
A. 180
B. 196
C. 210
D. 240
E. 256
05 Apr 2016, 09:58
Kudos
Bookmarks
Number of hexagons connecting 6 of the 10 points = 10C6 = (10*9*8*7)/(4*3*2*1) = 210
Answer: C
Answer: C
07 Apr 2016, 06:05
Kudos
Bookmarks
In a certain circle there are 10 points. What is the number of the hexagons connecting 6 points of the 10 points?
A. 180
B. 196
C. 210
D. 240
E. 256
-> 10C6=10C4=(10)(9)(8)(7)/4!=210.
Thus, the answer is C.
A. 180
B. 196
C. 210
D. 240
E. 256
-> 10C6=10C4=(10)(9)(8)(7)/4!=210.
Thus, the answer is C.
