Refer to the following letter and symbol series and answer the question that follows.
Counting to be done from left to right only.
(Left) M L Z Q @ L X + E S E / J L Q Y Q W + X R (Right)
How many such letters are there each of which is immediately preceded by a symbol
and also immediately followed by a symbol?8945

The correct option is None.

To solve this problem, we need to analyze the given sequence from left to right and identify all letters that satisfy a specific condition.
Condition: A letter must be immediately preceded by a symbol AND immediately followed by a symbol.
In other words, we are looking for the pattern: [Symbol] [Letter] [Symbol].

Let's write down the given sequence carefully from left to right:

(Left) M L Z Q @ L X + E S E / J L Q Y Q W + X R (Right)

Now, let's examine every letter that has symbols around it:

1. Consider the letter L after @: The sequence around it is @ L X. Here, @ is a symbol, but X is a letter (not a symbol). So, this does not satisfy the pattern.
2. Consider the letter X before +: The sequence around it is L X +. Here, L is a letter, so it is not preceded by a symbol.
3. Consider the letter E after +: The sequence around it is + E S. Here, + is a symbol, but S is a letter (not a symbol).
4. Consider the letter E before /: The sequence around it is S E /. Here, S is a letter, so it is not preceded by a symbol.
5. Consider the letter J after /: The sequence around it is / J L. Here, / is a symbol, but L is a letter (not a symbol).
6. Consider the letter W before +: The sequence around it is Q W +. Here, Q is a letter, so it is not preceded by a symbol.
7. Consider the letter X after +: The sequence around it is + X R. Here, + is a symbol, but R is a letter (not a symbol).

After inspecting the entire sequence, there is no letter that is both preceded by a symbol and followed by a symbol.

Therefore, the total count of such letters is None.