question_answer

In a queue of children. Jack is sixth from the left and Cody is seventh from the right. When they interchange their places among themselves. Jack becomes fifteenth from the left. Then what will be Cody's position from the right?

A) 18th          

B)                    16th

C) 14th                    

D)       12th

E) None of these

Correct Answer: B

Solution :

Explanation: Answer (b) is correct. Since Jack and Cody interchange places, so Jack's new position (15th from left) is the same as Cody's earlier position (7th from right). So, number of children in the queue = \[\left( 15+7 \right)-1=21.\] Now, Cody's new position is the same as Jack's earlier position sixth from left. Therefore Cody's position from the right = \[\left( 21-6+1 \right)\] = 16th position.