A student is ranked 21th from right and 11th from left. How many students are there in totality ?
Choose the correct choice.
A) 18  B) 19  C) 20  D) 31  E) 22
From right 21 , From left 11   Total = 21+11-1= 
<gadget id="calculator">21+11-1</gadget>
<output>31</output>
31   ANSWER:31
<result>D</result>
A student is ranked 21th from right and 11th from left. How many students are there in totality ?