Notesale: Turn your study into money

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COMBATORICS:1
...
Numbers greater than 1000 but not greater than 4000 which can be
formed from the digits 0,1, 2, 3, 4 (repetition of digits is allowed) are
(A) 350
(B) 374
(C) 375(Ans)
(D) None of these
3
...
In how many different ways can they
and the host be seated at a circular table, if two particular persons are to be
seated on either side of the host
(A) 20!
(B) 2
...
Find sum of all the numbers that can be made by the digits 2,3,3,4,4,4 ?
(A) 22,22,220
(B)2,22,22,200(Ans)
(C) 2,22,22,400
(D) 3,42,51,050
5
...
Number of divisors of form (4n + 2), n ≥ 0 of the integer 240 is
(A) 4(Ans)
(B) 8
(C) 10
(D) 10
(D) 3
...
A box contains 2 white balls, 3 black balls and 4 red balls
...
The letters of the word COCHIN are permutated and all the
permutations are arranged in alphabetical order as in an English dictionary
...
The number of 7 digits integers, with sum of the digits equal to 10 and
form by using the digits 1, 2, and 3 only is
(A) 55
(B) 77(Ans)
(C) 66
(D) 88
10
...
The number of trailing zeros is 200!
(A) 41
(B) 38
(C) 49(Ans)
(D) 48
12
...
How many 5 letters words can be formed from the word 'ARTICLE' if
the word contains 2 vowels and 3 consonants?
(A) 1080
(B) 1440(Ans)
(C) 1732
(D) None of these
14
...
He
wishes to invite 5 of them for party
...
Then the number of different ways in which she can invite 5
friends is
(A) 56

(B) 112(Ans)
(C) 168
(D) None of these
15

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