CBSE Class 11-science Maths Applications of Permutations and Combinations
- if npr-1/a=npr/b=npr+1/c then the value of b square/a(b+c)
- the number of words which can be formed out of the letters of the word PARTICLE so that vowels occupy even place is
- How many words can be formed by taking 4 letters at a time out of the letters of the words MATHEMATICS?
- Find the no. Of arrangements of the letters of the word Delhi if e always comes before i.
- From a group of 15 cricket players, a team of 11 players is to be chosen. In how many ways can this be done?
- In how many ways can 5 girls and 3 boys be seated in a row so that no two boys are together?
- In how many ways can 9 persons sit around a table so that all shall not have the same neighbours in any two arrangements?
- How many triangles can be obtained by joining 12 points, five of which are collinear?
- A student has to answer 10 questions, choosing at least 4 from each of part A and part B. If there are 6 questions in Part A and in part B, in how many ways can the student choose 10 questions?
- If 8 parallel lines in a plane are intersected by a family of 10 parallel lines. Find the number of parallelograms formed?