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In a row of students, A is 8th from the left and B is 15th form the right. If they interchange their positions. A becomes 42th form the left. How many students are in the row?

In a row of students, A is 8th from the left and B is 15th form the right. If they interchange their positions. A becomes 42th form the left. How many students are in the row? Correct Answer 56

Position of A from the left end = 8th

Position of B from the right end = 15th

After interchanging positions, the new position of A = 42nd

Total number of students in the row = (42 + 15) – 1

= 57 – 1

= 56

Hence, ‘56’ is the correct answer.

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