A student is ranked 13th from right and 8th from left.how many are there?  Choices.
A) 18 B) 19 C) 20 D) 21 E) 22

Rationale: "13 th from right means = x + 12 8 th from left means = 7 + x total = 12 + 7 + 1 = 20 answer : c"
Answer: C