In a row of 30 people during a vaccination drive, the position of Keith from the right side is 12.What is Keith's position from the left side of the same row?

To find Keith's position from the left side of the row, follow these steps:

1. First, understand that the total number of people in the row is 30.
2. Keith's position from the right side is given as 12.
3. The position from the left side can be calculated by subtracting Keith's position from the right side from the total number of people in the row, and then adding 1. This is because the positions from both ends of the row are inclusive.
4. So, Keith's position from the left side = (Total number of people - Keith's position from the right side) + 1
5. Substituting the given values, Keith's position from the left side = (30 - 12) + 1 = 18 + 1 = 19.

So, Keith is 19th from the left side of the row.