In a row, P is 7th from the left and Q is 12th from the right. If they interchange their positions, P becomes 22nd from the left. What is the total number of people in the row?
Show answer & explanation
Correct answer: C
Explanation
P = 7th from the left
Q = 12th from the right
If they swap places, P becomes 22nd from the left.
Find Q's position from the left.
Because after the swap, P sits in Q's place and is 22nd
from the left.
Therefore, Q's position from the left = 22.
Formula for total persons:
Total persons = (position from the left) + (position
from the right) - 1
For Q:
= 22 + 12 − 1
= 33