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08 Nov 2005, 10:12
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What is the value of 1*1! + 2*2! + 3*3! + ............ n*n!,
where n! means n factorial or n(n-1)(n-2)...1 (1) n(n-1)(n-1)!
(A) n(n-1)(n-1)!
(B) (n+1)!/(n(n-1))
(C) (n+1)! - n!
(D) (n + 1)! - 1!
where n! means n factorial or n(n-1)(n-2)...1 (1) n(n-1)(n-1)!
(A) n(n-1)(n-1)!
(B) (n+1)!/(n(n-1))
(C) (n+1)! - n!
(D) (n + 1)! - 1!
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08 Nov 2005, 10:19
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There are 5 Rock songs, 6 Carnatic songs and 3 Indi pop songs. How many different albums can be formed using the above repertoire if the albums should contain at least 1 Rock song and 1 Carnatic song?
(A) 15624
(B) 16384
(C) 6144
(D) 240
(E) 14876
(A) 15624
(B) 16384
(C) 6144
(D) 240
(E) 14876
