Aptitude - Permutation and Combination - Discussion
Discussion Forum : Permutation and Combination - General Questions (Q.No. 2)
2.
In how many different ways can the letters of the word 'LEADING' be arranged in such a way that the vowels always come together?
Answer: Option
Explanation:
The word 'LEADING' has 7 different letters.
When the vowels EAI are always together, they can be supposed to form one letter.
Then, we have to arrange the letters LNDG (EAI).
Now, 5 (4 + 1 = 5) letters can be arranged in 5! = 120 ways.
The vowels (EAI) can be arranged among themselves in 3! = 6 ways.
Required number of ways = (120 x 6) = 720.
Video Explanation: https://youtu.be/WCEF3iW3H2c
Discussion:
97 comments Page 7 of 10.
Juliana said:
7 years ago
How do you calculate combinations, can you do an example? Please.
Rakesh said:
9 years ago
In leading 5! * 3! ways we can fill all vowels come together.
Madhusudan said:
1 decade ago
Could you kindly let me know what is ( ! ).Howe 5! = 120 ?
(1)
Sandeep said:
1 decade ago
can any one explain ? y 5!*3! & y not like this 5!+3!
DHEEPAK S said:
4 years ago
I can't understand this, Please anyone help me to get it.
(7)
Amnafida said:
1 decade ago
Describe that how we know about here permutation is use?
Sundar said:
1 decade ago
@Madhusudan
5! = 5 Factorial = 1 x 2 x 3 x 4 x 5 = 120
5! = 5 Factorial = 1 x 2 x 3 x 4 x 5 = 120
(1)
RAJA said:
10 years ago
Hai @Soumya.
S its 1 letter only. Hope you understand.
S its 1 letter only. Hope you understand.
Raj said:
1 decade ago
Friends, How do you say this question is permutation.
Pallavi said:
6 years ago
Why 120*6?
Why not 120+6? Please tell me the reason.
Why not 120+6? Please tell me the reason.
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