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19 Mar 2005, 09:20
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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% (01:51) correct
42%
(01:19)
wrong
based on 130
sessions
History
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Not Attempted Yet
In an examination, a minimum of marks is to be scored in each 6 subjects to pass. How many ways can a student fail.
(a) 6
(b) 21
(c) 63
(d) 84
(e) 72
(a) 6
(b) 21
(c) 63
(d) 84
(e) 72
19 Mar 2005, 11:26
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anirban16
(C) 63,
Two possible outcomes for each test => total of 2^6 outcomes.
One is a pass outcome, the remaining are the failure cases.
Thus failure ways = 64 - 1 = 63.
Hope that helps.
19 Mar 2005, 11:34
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"C"
All possibilities - when he passes all.
2^6 -1 = 63
All possibilities - when he passes all.
2^6 -1 = 63
