Question
A person has 12 friends out of which 7 are relatives. In how many ways can he invite 6 friends such that at least 4 of them are relatives?
More Permutation and combination Questions
- Among a set of 6 black balls and 3 white balls, how many selections of 5 balls can be made such that at least 3 of them are black balls?
- How many arrangements are possible from the letters of “ADMINISTRATION” without disturbing the relative order of vowels and consonants?
- A group consists of 9 boys and 7 girls. In how many ways can 4 boys and 3 girls be selected from the group?
- How many different words can be formed with the letters of the word PRACTICE such that each of the word begin with E and ends with R?
- How many four-letter words without repetition having exactly two vowels can be formed by using the letters of the word "MEASURE"?
- In how many ways can 2 girls and 8 boys be seated in a row so that girls are always together?
- Count the number of “words” from MISSISSIPPI when all the vowels occur together.
- How many straight lines can be formed from 9 points out of which 4 are colinear?
- How many straight lines can be formed from 9 points out of which 4 are colinear?
- 30 junior and 38 senior participants participate in a tournament. Each pair of juniors plays one match, and each pair of seniors plays one match. Number of...
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