In a row of boys, Ehsan is 10th from the left end and Tariq is 14th from the right end. When Ehsan and Tariq interchange their positions, Ehsan becomes 23rd from the left end. How many boys are there in the row?
Correct answer D. 36
Explanation
After the swap Ehsan occupies Tariq's old place, so that place is 23rd from the left and 14th from the right. Total = 23 + 14 - 1 = 36.
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