- A18
- B19
- C20
- D17
Step-by-Step Solution
Total = (position from left) + (position from right) − 1 = 7 + 12 − 1 = 18 children.
Answer: A) 18
In a row of children all facing north, R is 7th from the left end and 12th from the right end. How many children are there in the row?
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