Study the following alphanumeric symbol series carefully and answer the questions given below:
F 4 A % T 9 µ Z M 3 N # L & E 2 X C 7 G D * O 5 R ∞ H 1 J $ @ K 8 B

What is the sum of the digits which are 3rd from the left end and 4th from the right end?

The correct option is 10.

To find the sum of the digits, let us first identify all the digits present in the given alphanumeric symbol series:
Series: F 4 A % T 9 µ Z M 3 N # L & E 2 X C 7 G D * O 5 R ∞ H 1 J $ @ K 8 B

Extracting the digits in order from left to right, we get:
4, 9, 3, 2, 7, 5, 1, 8

Now, let us determine the specific digits required by the question:

1. 3rd digit from the left end:
Looking at our list of digits from the left (4, 9, 3, ...), the third digit is 3.

2. 4th digit from the right end:
Looking at our list of digits from the right (..., 7, 5, 1, 8):
- 1st digit from the right is 8
- 2nd digit from the right is 1
- 3rd digit from the right is 5
- 4th digit from the right is 7

Now, we calculate the sum of these two digits:
$\mathrm{Sum}=3+7=10$