A library has 5 copies of one books 4 cpies each of two books , 6 copies each of three books and 1 copy each of eight books . In how many ways can all the books be arranged ?

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 !)^2(c !)^3) c. ((a+b+3c+d)!)/((c !)^3) d. ((a+2b+3c+d)!)/(a !(2b !) (c !)^3)

The ratio of story books and text books of preetam is 2:5 . If preetam has 4 story books, then find how many text books he has.

In an assembly of 10 scholars , three are mathematicians and three are physicists , the others are both physicists and mathematicians . There are two rows containing 5 chairs and it is intended that all mathematicians are to be seated in one row and the physicsts in the other , the remaining scholars are to be seated in either row in the vacant positions left .In how many ways can all the scholars be seated ?

Two different books have 3 volumes for each and three other different books have 2 volumes for each . In how many different ways can these 12 volumes be arranged on a shelf , so that the volumes of the same books may remain side by side ?

In a survey of college students it was found that 40% use their own books, 50% use library books, 30% use borrowed books, 20% use both their own books and library books. 15% use their own books and borrowed books, 10% use library books and borrowed books, and 4% use their own books, library books and borrowed books. Calculate the percentage of students who do not use a book at all.

There are 5 packets of biscuits. If each has 1/4 part of a packet of biscuits. Let’s find how many can eat the biscuits.

At a certain examination , there are 8 papers . In order to pass the examination a candidate has to secure a minimumof marks in each of the 8 papers . In how many ways can a candidate fail in the examination ?

There are 3 sections in a question paper each containing 5 questions. A candidate has to solve only 5 questions, choosing at least one question from each section. In how many ways can he make his choice ?

Roorkee University has to send 10 professors to 5 centers for its entrance examination, 2 to each center. Two of the enters are in Roorkee and the others are outside. Two of the professors prefer to work in Roorkee while three prefer to work outside. In how many ways can this be made if the preferences are to be satisfied?

Mohini loves to read story books. She finishes 1/3 part of the book in an hour. Let us find, what part of book she read in 5/6 of an hour.