In a race of 50 runners, if Mark is in 15th position and he swaps places with the runner in 30th position, what will be Mark's new rank from the top?

C. 16

E is ranked 3rd from the top and 7th from the bottom in a group. How many people are in the group?

B. 10

B is ranked 5th from the bottom in a group of 25 people. If B swaps positions with C, who is ranked 12th from the top, what will be B's new rank from the top?

C. 8TH

In a class of 30 students, John is ranked 8th from the top. What is his rank from the bottom?

A. 22ND

In a race of 15 participants, if Sam is 3rd from the top and 13th from the bottom, how many participants are there in total?

A. 15