Student are sitting in a row in which the position of X is 17^th from the left and that of Y is 14^th from the right. If they interchange their positions, X’s position becomes 7^th from the left. How many students are there in the row?

Question

Question

This question was previously asked in

RRB ALP Previous Paper 7 (Held On: 13 Aug 2018 Shift 2)

Answer 1

Draw X and Y’s position in straight line,

13-Aug Shift 2 Shivraj 27Q Rashi (1) images Q17

Now they interchange their position and X becomes 7^th from left end.

13-Aug Shift 2 Shivraj 27Q Rashi (1) images Q17a

Now we can see X is 7^th from left end and 14^th from right end.

So, total boys in this row = 7 + 14 – 1 = 20.