Q. How many words can be formed with the letters of the word ‘CASTLE’ when ‘O’ and ‘A’ occupying end places.

View solution

Q. Determine the number of ways of choosing a cricket team (consists of 11 players) out of 18 players if a particular player is never chosen.

View solution

Q. How many different choices can be made from 5 roses, 4 marigold and 8 sunflowers if at least one flower is to be chosen for making of garland?

View solution

Q. In how many ways 6 pens can be selected from 15 identical black pens?

View solution

Q. Determine the number of ways of selecting one or more letters from the letters BBBBBB?

View solution

Q. Determine the number of ways such that 5 men and 5 women be seated at a round table if no two women are seated together.

View solution

Q. Find the number of ways in which 4 people E, F, G, H, A, C can be seated at a round table, such that E and F must always sit together.

View solution

Q. There are 6 equally spaced points A, B, C, D, E and F marked on a circle with radius R. How many convex heptagons of distinctly different areas can be drawn using these points as vertices?

View solution

Q. There are 2 twin sisters among a group of 15 persons. In how many ways can the group be arranged around a circle so that there is exactly one person between the two sisters?

View solution

Q. The number of words of 4 consonants and 3 vowels can be made from 15 consonants and 5 vowels, if all the letters are different is ________

View solution

Q. How many ways are there to arrange 7 chocolate biscuits and 12 cheesecake biscuits into a row of 19 biscuits?

View solution

Q. If a, b, c, d and e are five natural numbers, then find the number of ordered sets(a, b, c, d, e) possible such that a+b+c+d+e=75.

View solution

Q. There are 15 people in a committee. How many ways are there to group these 15 people into 3, 5, and 4?

View solution

Q. There are six movie parts numbered from 1 to 6. Find the number of ways in which they be arranged so that part-1 and part-3 are never together.

View solution

Q. How many ways are there to divide 4 Indian countries and 4 China countries into 4 groups of 2 each such that at least one group must have only Indian countries?

View solution

Q. Find the number of factors of the product 5⁸ * 7⁵ * 2³ which are perfect squares.

View solution

Q. From a group of 8 men and 6 women, five persons are to be selected to form a committee so that at least 3 women are there on the committee. In how many ways can it be done?

View solution

Q. Calculate sum of divisors of n = 1900.

View solution

Q. Given the factorization of a number n, then the sum of divisors can be computed in _______

View solution

Q. Calculate the sum of divisors of N = 9600.

View solution