Question
Five different pens out of which 2 are red and the rest are blue are to be arranged in a line. Find the number of ways in which the two red pens are not placed together.
More Permutation and combination Questions
- A cricket team of 9 players is to be formed from 10 batsmen and 6 bowlers. Find the number of ways to form the team such that at least 7 batsmen are select...
- There are 3 identical toys and 4 identical books. How many distinct arrangements are possible on a shelf such that all three toys do not appear together?
- In how many ways can a squad of 10 people be selected from 9 trainees and 5 supervisors such that the squad has at least 8 trainees?
- In how many different ways can the letters of the word ‘VARIOUS’ be arranged in such a way that the vowels occupy only the odd positions?
- How many four-letter words without repetition having exactly two vowels can be formed by using the letters of the word "EDUCATE"?
- How many numbers of five digits may be formed with the digits 7, 2, 0, 0, and 1?
- Find the number of words that can be formed by using all letters of the word ' FRIDAY', if order of vowels remains same.
- Find the number of words that can be formed by using all letters of the word 'LAPTOP', if order of vowels remains same.
- From the letters of BALLOON, how many “words” can be formed if all the vowels stay together?
- How many four-letter words without repetition having exactly two vowels can be formed by using the letters of the word "READING"?
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