The number of ways in which 12 books can be put in three shelves with four on each shelf is a. `(12 !)/((4!)^3)` b. `(12 !)/((3!)(4!)^3)` c. `(12 !)/((3!)^3 4!)` d. none of these

There are three copies each of four different books. The number of ways in which they can be arranged in a shelf is. a. (12 !)/((3!)^4) b. (12 !)/((4!)^3) c. (21 !)/((3!)^4 4!) d. (12 !)/((4!)^3 3!)

The number of ways in which 12 different objects can be divided into three groups each containing 4 objects is (i) ((12!))/((4!)^(3)(!3)) (ii) ((12!))/((4!)^(3)) (iii) ((12!))/((4!)) (iv) none

Number of ways in which 12 different things can be distributed in 3 groups, is

A library has a copies of one book, b copies each of two books, c copies each of three books, a single copy of d books. The total number of ways in which these books can be arranged in a shelf is equal to a. ((a+2b+3c+d)!)/(a !(b !)^2(c !)^3) b. ((a+2b+3c+d)!)/(a !(2b !)^(c !)^3) c. ((a+b+3c+d)!)/((c !)^3) d. ((a+2b+3c+d)!)/(a !(2b !)^(c !)^)

A library has a copies of one book, b copies each of two books, c copies each of three books, a single copy of d books. The total number of ways in which these books can be arranged in a shelf is equal to a. ((a+2b+3c+d)!)/(a !(b !)^2(c !)^3) b. ((a+2b+3c+d)!)/(a !(2b !)^(c !)^3) c. ((a+b+3c+d)!)/((c !)^3) d. ((a+2b+3c+d)!)/(a !(2b !)^(c !)^)

In how many ways can 12 books be divided in 3 students equally?

The number of ways in which 6 men can be arranged in a row so that three particular men are consecutive is 4!xx3! b. 4! c. 3!xx3! d. none of these

1/((2 1/3))+1/((1 3/4)) is equal to (a) 7/(14) (b) (12)/(49) (c) 4 1/(12) (d) None of these

The number of different mastrices which can be formed using 12 different real numbers is (A) 6(12)! (B) 3(12)! (C) 2(10)! (D) 4(10)!|

If the number of ways in which n different things can be distributed books each having 5 copies takig at least 2 copies of each books is 256, then n= (A) 3 (B) 4 (C) 5 (D) none of these