There are 10 YES or NO questions. How many ways can these be answered?
Practice Permutation and Combination – There are 10 YES or NO questions. How many ways can these be answered?
Permutation and Combination
Each question has four choices out of which only one is correct. A candidate has
Practice Permutation and Combination – Each question has four choices out of which only one is correct. A candidate has to answer four questions. The number of ways he fails to give all answers correctly, is
From a pack of 52 playing cards, 4 cards are removed at random. In how many ways
Practice Permutation and Combination – From a pack of 52 playing cards, 4 cards are removed at random. In how many ways can the 1st place and 3rd place cards be drawn out such that both are black ?
A boy has 4 different boxes and 5 different marbles. In how many ways can he pla
Practice Permutation and Combination – A boy has 4 different boxes and 5 different marbles. In how many ways can he place the marbles in the boxes such that each box has at least one marble ?
In CAT entrance examination paper there are 3 sections, each containing 5 questi
Practice Permutation and Combination – In CAT entrance examination paper there are 3 sections, each containing 5 questions. A candidate has to solve 5, choosing at least one from each section. The number of ways he can choose is
There are n different books and p copies of each. the number of ways in which a
Practice Permutation and Combination – There are n different books and p copies of each. the number of ways in which a selection can be made from them is
A polygon has 44 diagonals, the number of its sides is
Practice Permutation and Combination – A polygon has 44 diagonals, the number of its sides is
A committee is to be formed comprising 7 members such that there is a simple maj
Practice Permutation and Combination – A committee is to be formed comprising 7 members such that there is a simple majority of men and at least 1 women. The shortlist consists of 9 men and 6 women. In how many ways can this be done?
In how many ways can 4 ladies and 4 men form two mixed doubles teams for a tenni
Practice Permutation and Combination – In how many ways can 4 ladies and 4 men form two mixed doubles teams for a tennis match?
In how many ways can the digits 2,3,5,7 and 9 be placed to form a three-digit nu
Practice Permutation and Combination – In how many ways can the digits 2,3,5,7 and 9 be placed to form a three-digit number so that the higher order digit is always greater than the lower order digits? (Assume digits are all different).
The number of ways in which 8 different flowers can be strung to form a garland
Practice Permutation and Combination – The number of ways in which 8 different flowers can be strung to form a garland so that 4 particular flowers are never separated is
There are 5 letters and five addressed envelops. the number of ways in which all
Practice Permutation and Combination – There are 5 letters and five addressed envelops. the number of ways in which all the letters can be put in wrong envelops is
The number of triangles that can be formed by choosing the vertices from a set o
Practice Permutation and Combination – The number of triangles that can be formed by choosing the vertices from a set of 12 points, seven of which lie on the same straight line is
What is the highest power of 82 contained in 83!-82! ?
Practice Permutation and Combination – What is the highest power of 82 contained in 83!-82! ?
In how many ways can a number 6084 be written as a product of two different fact
Practice Permutation and Combination – In how many ways can a number 6084 be written as a product of two different factors ?