In a given number 82617543, if 1 is added to each even digit and 1 is subtracted from each odd digit, what will be the sum of all the odd digits in the new number thus formed?

Given: 82617543

Add 1 to each even digit and subtract 1 from each odd digit.

8 even → 8 + 1 = 9

2 even → 2 + 1 = 3

6 even → 6 + 1 = 7

1 odd → 1 − 1 = 0

7 odd → 7 − 1 = 6

5 odd → 5 − 1 = 4

4 even → 4 + 1 = 5

3 odd → 3 − 1 = 2

New digit are: 9, 3, 7, 0, 6, 4, 5, 2

Odd digits are: 9, 3, 7, 5

Sum: 9 + 3 + 7 + 5 = 24

24 will be the sum of all the odd digits in the new number thus formed.

Thus, correct option is (d).