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In a row of students, Rohan is 15th from the left and 18th from the right. How many students are there in the row?
32
33
34
31
32
When a single person's position from both ends is known, total students = (Left + Right) - 1.
When a single person's position from both ends is known, total students = (Left + Right) - 1.
Identify Given Positions
Rohan's position is given as 15th from the left and 18th from the right.
Apply the Total Formula
Total students = (Position from Left + Position from Right) - 1, since Rohan is counted twice in the addition.
Calculate Final Result
Total = 15 + 18 - 1 = 33 - 1 = 32 students.
B: 33 is incorrect because it fails to subtract 1 for the double-counted person. C: 34 and D: 31 are incorrect due to arithmetic errors.
A is correct because the total number of students in a row equals the sum of a person's left and right positions minus one (15 + 18 - 1 = 32).
Always remember to subtract 1 when calculating the total number of items or persons given dual-ended positions.
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