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In a row of boys, Amit is 15th from the left and 18th from the right. How many boys are in the row?
32
33
31
34
32
When a person's position from both left and right ends is given, use the direct formula: Total = Left + Right - 1.
When a person's position from both left and right ends is given, use the direct formula: Total = Left + Right - 1.
Identify Given Positions
Amit is given as 15th from the left and 18th from the right in the row.
Apply Total Count Formula
Calculate the total number of boys by adding the left and right positions and subtracting 1 to avoid double-counting Amit: Total = 15 + 18 - 1 = 32.
B: 33 is incorrect because it fails to subtract 1, thereby counting Amit twice. C: 31 is incorrect due to an arithmetic error. D: 34 is incorrect because it mistakenly adds 1 instead of subtracting 1.
A is correct because the total number of boys when a person's position from both ends is known is given by (15 + 18) - 1, which equals 32.
Always remember to subtract 1 when calculating total items or persons from dual-end position data for the exact same individual to account for overlap.
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