Permutations & Combinations :Revision
- Sangeeta Gulati
Find the number of ways in which 5 boys and 5 girls be seated in a row so that no two girls may sit together.
How many words each of 3 vowels and 2 consonants can be formed from the letters of the word INVOLUTE?
In an examination a candidate has to pass in each of the four subjects. In how many ways can he fail?
If , find n.