I am standing in a row and my position is 9th from either side. How many…

When a person's position is known from both ends of a row, the total number of people in the row equals the sum of the two positions minus 1, because the person themself is included once in each of the two counts, so adding both counts double-counts that one person.

Applying this to the given situation:

1. The person's position counted from the left end is the 9th.

2. The person's position counted from the right end is also the 9th.

3. Total people = 9 + 9 − 1.

Cross-check with a second method — count the people on each side separately:

1. There are 8 people standing before this position (since the position itself is the 9th, 8 people come before it).

2. There are 8 people standing after this position, by the same logic from the other end.

3. Adding the person themself: 8 + 8 + 1.

Both methods give the same total: 17 people are in the row.