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Considering 26 letters alphabet
For the first letter there are 26 choices, for the second also, but for the third just one choice (the same letter as the second) and for the fourth one choice (the same as the first letter)
so there are 26x26 palindromes
and 26x26x26x26 possible words of four letters
so the probability would be (26x26) / (26x26x26x26)
If aaaa is not to be consider as a palindrome then it's (26x25) / (26x26x26x26)
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There are 264 possible combinations of four letters. There are 262 possible palindromes, because there are 26 choices for each of the first and second letters, and the third, fourth letters are uniquely determined. Hence the probability is 262/264, or 1/262.
What else can I help you with?
What is the probability that if 6 letters are used no letters are repeated?
It is approx 54%.
A sentence with the word palindrome?
A palindrome is any series of letters, numbers or other symbols that are the same whether read forward or backward, such as the word level.
What is a 1 step palindrome?
A "one step palindrome is "any number can be changed into a palindrome number by reversing the digits and adding to the original number" one time. For example, the number 23 can be turned into a palindrome in just one step: 23 + 32 = 55 The same goes for the number 12: 12 + 21 = 33
What is the palindrome word for make things last longer that has 3 letters with a k in the middle?
eke
What is the probability of choosing a vowel or one of the first 10 letters of the alphabet?
The probability for a single random choice, is 6/13.
What sequence is a palindrome?
A palindrome is a number, or sequence of letters, that is read the same from left to right, as from right to left. For example, the word "noon" - if you read it backwards, you also get "noon".
What is an aboriginal language that is also a palindrome 9 letters teivaviet?
If this is for the Facebook palindrome it's IVETATEVI
What is the lexicographically smallest palindrome that can be formed using the letters in the keyword "keyword"?
The lexicographically smallest palindrome that can be formed using the letters in the keyword "keyword" is "deed."
What are words with 10 letters that is made by using letters droinmepal?
Those letters spell palindrome.
What is called when you mix up letters?
a spoonerism
What is a palindrome with Four letters for organ of sight?
If it's three letters, it's "eye."
What is a palindrome for a type of car that has 4 letters?
Racecar...... R A C E Four letters....
What is a word called that when its letters are rearranged still means the same?
palindrome
What is the English palindrome with the most letters?
tattarrattat - the longest palindrome in the Oxford English Dictionary, coined by James Joyce in Ulysses for a knock on the door
What is the probability that if 9 letters are typed no letters are repeated?
3490 to 1
What is the probability that if 6 letters are used no letters are repeated?
It is approx 54%.
A sentence with the word palindrome?
A palindrome is any series of letters, numbers or other symbols that are the same whether read forward or backward, such as the word level.
