In a row of boys, Charu is 7th from the left end and Usman is 9th from the right end. When Charu and Usman interchange their positions, Charu becomes 14th from the left end. How many boys are there in the row?
Correct answer B. 22
Explanation
After the swap Charu occupies Usman's old place, so that place is 14th from the left and 9th from the right. Total = 14 + 9 - 1 = 22.
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