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In a row of children all facing north, Sita is 7th from the left and Gita is 4th from the right. When Sita and Gita interchange their positions, Sita becomes 15th from the left. How many children are there in the row?

Competition practiceOrder & Ranking
  • A20
  • B17
  • C18
  • D19

Step-by-Step Solution

After interchange Sita takes Gita's place, which is 4th from the right and now 15th from the left. Total = 15 + 4 - 1 = 18.
Answer: C) 18

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