question_answer

In a row at a bus stop, 'A' is 7th from the left and 'B' is 9th from the right. They both interchange their positions. Now A becomes 11th from the left How many people are there in the row?

A)  10                   

B)  20

C)  19                   

D)  18

Correct Answer: C

Solution :

[c] Total number of people in the row \[=11+9-\,1=19\]