Aptitude - Permutation and Combination - Discussion
Discussion Forum : Permutation and Combination - General Questions (Q.No. 12)
12.
How many 4-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed?
Answer: Option
Explanation:
'LOGARITHMS' contains 10 different letters.
| Required number of words | = Number of arrangements of 10 letters, taking 4 at a time. |
| = 10P4 | |
| = (10 x 9 x 8 x 7) | |
| = 5040. |
Discussion:
68 comments Page 6 of 7.
Motunrayo said:
1 decade ago
Please I want to know when to use combination and permutation.
Kuldeep vijay said:
1 decade ago
Yes, when repetitions not allowed it is an ordering condition.
Swati said:
7 years ago
@Krishna Kumar.
Formula for Permutation nPr= n!/ (n-r!) *r!
Formula for Permutation nPr= n!/ (n-r!) *r!
Akash kumar said:
6 years ago
if repetition allowed then how to solve it? Please tell me.
(1)
Vaishali.n said:
1 decade ago
How to know whether to use permutation or combination?
Satadru said:
8 years ago
If repetitions is allowed the formula would be 10^4.
PRABHA said:
2 decades ago
I HAVEA DOUDT : 1O C P MEANS 10X9X8X7/(1X2X3X4)
Toni said:
4 years ago
What if we had a repetition of letters? Explain.
Ashutosh Sharma said:
1 decade ago
Which formula is used to solve this problem?
AYYAJ said:
9 years ago
If repetition is allowed what is the answer?
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