There are 55 trees planted in a row. Tree A is 19th from the left side and Tree B is 21st from the right side. Find the number of trees between A and B.
Show answer & explanation
Correct answer: B
Explanation
A is 19th from the left.
B is 21st from the right.
First find B's position from the left:
position from the left = 55−21+1=35
B is 35th from the left.
Number of trees between A (19) and B (35):
35−19−1=15
There are 15 trees between A and B.