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
- In how many different ways can the letters of the word “MONDAY” be arranged in such a way that the vowels always come together?
- From 10 musicians and 5 singers, a band of 8 members is to be formed. In how many ways can the band be formed such that there are at least 6 musicians?
- How many four-letter words without repetition having exactly two vowels can be formed by using the letters of the word "MACHINE"?
- Find the no. of words formed by using all the letter of the word DISCOUNT, so that the vowels are never together?
- In how many different ways can the letters of the word QUANTITY be arranged so that the vowels always come together?
- In how many different ways can the letter of the word ‘PRAISE’ be arranged?
- 11 people decided to spend an afternoon in two groups. A group of them decided to go to the theater and the remaining decided to play tennis. In how many w...
- Using all the letters of the word IMPACT, how many words start with a vowel but end with a consonant?
- From the digits 1, 2, 3, 4, 5, 6 and 7, how many 4‑digit even numbers can be formed without repetition?
- From 7 persons A, B, C, D, E, F and G, how many different committees of 3 persons can be formed if A must be included but B must not be included?
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